RANDOLPH D. MOSS, United States District Judge
To encourage pharmaceutical companies to study the safety and effectiveness of pediatric uses of drugs approved for adults, the Federal Food, Drug, and Cosmetic Act (FFDCA) grants six months of pediatric exclusivity to the sponsor of a brand-name drug if the sponsor conducts studies that fairly respond to a written request from the Food and Drug Administration (FDA). 21 U.S.C. § 355a(d)(4). At the urging of Plaintiff Amgen Inc., the FDA issued a written request asking that Amgen conduct pediatric studies of its drug Sensipar (cinacalcet hydrochloride), and Amgen endeavored to fulfill the request. Ultimately, however, the FDA found that Amgen had failed to complete a study on the safety of cinacalcet hydrochloride in children ages 28 days to < 6 years and concluded that Amgens studies did not fairly respond to the written request. The FDA, accordingly, denied Amgens request for pediatric exclusivity. Subsequently, the FDA denied both Amgens request for reconsideration and its appeal of that decision.
Amgen challenges the FDAs decision as well as the agencys underlying interpretation of the fairly respond requirement. The matter is now before the Court on Amgens motion for summary judgment, Dkt. 60, and cross-motions for summary judgment filed by the FDA, Dkt. 65, and four intervenor-defendants, Dkt. 63. For the reasons that follow, the Court will DENY in part and GRANT in part Amgens motion and will DENY in part and GRANT in part the FDAs and the intervenor-defendants cross-motions for summary judgment.
I. BACKGROUND
A. Statutory Background
A manufacturer seeking to market a new drug in the United States must first obtain approval from the FDA. The approval process is both time-consuming and expensive. Among other things, the applicant-or sponsor-must submit a new drug application (NDA) containing the extensive data and information necessary to demonstrate that the new-or pioneer-drug is safe and effective, 21 U.S.C. § 355(b)(1), as well as a certification relating to each patent that claims the drug or a use of the drug, 21 U.S.C. § 355(b)(2).
The Drug Price Competition and Patent Term Restoration Act of 1984, Pub. L. No. 98-417, 98 Stat. 1585-popularly known as the Hatch-Waxman Act-created an alternative path for manufacturers of generic drugs. Instead of submitting its own clinical data on safety and efficacy, a generic manufacturer may submit an abbreviated new drug application (ANDA) showing that the generic version of the drug contains the same active ingredient as the pioneer drug and is bioequivalent to that drug. 21 U.S.C. § 355(j) ; see AstraZeneca Pharm. LP v. FDA , 713 F.3d 1134, 1136 (D.C. Cir. 2013) (ANDAs need not include new clinical studies demonstrating ... safety or efficacy, but must propose the same basic labeling as approved for the pioneer drug.). In creating this shortcut, Congress sought to encourage the development of generic drugs to increase competition and lower prices. Amarin Pharm. Ireland Ltd. v. FDA , 106 F.Supp.3d 196, 198 (D.D.C. 2015). But, at the same time, Congress recognized that it needed to maintain incentives for pharmaceutical companies to invest in innovation and the creation of new drugs. Id. Accordingly, Congress provided increased intellectual property rights and periods of market exclusivity for those pioneer manufacturers that invent new drugs. Id. ; see also 21 U.S.C. § 355(j)(5)(F) ; AstraZeneca , 713 F.3d at 1136. After the period of marketing exclusivity ends, however, the FDA may ordinarily approve ANDAs, thus authorizing the marketing of competing, generic versions of the pioneer drug. AstraZeneca , 713 F.3d at 1136 ; see 21 U.S.C. § 355(j).
Although this statutory scheme proved successful in encouraging generic competition while maintaining the impetus to innovate, it failed to provide sufficient incentives for drug companies to conduct research on the effects of new drugs on children. In 1997, Congress found that the pharmaceutical industry had studied and labeled for use in children only a small portion of the drugs on the market, even though children suffer from many of the same diseases as adults and are often treated with the same medicines. S. Rep. No. 107-79, at 3-4 (2001). After looking for the cause of this lack of pediatric research, Congress concluded that there [was] little incentive for drug sponsors to perform studies for medications which they intend to market primarily for adults and [the] use [of which] in children is expected to generate little additional revenue. Id. at 4 (quoting S. Rep. No. 104-284 (1996) ). The absence of information on pediatric drug safety and efficacy, moreover, exposed children to a number of unique risks:
Dosing children based merely on their lower weight is often imprecise, since their bodies can metabolize medicines differently than adults. Some drugs may have different adverse side effects or toxicities in children than in adults, so estimating dosages for children from dosages found to be safe and effective in adults may not be appropriate. The lack of pediatric studies and labeling information may lead to unintended medical errors and place children at risk of being under-dosed or overdosed with medication. The lack of age-appropriate formulations (e.g., liquid form) can also make it difficult to give children and infants prescribed amounts of a needed medication.
Id. at 3.
To address this problem, Congress enacted a pediatric exclusivity statute. See Food and Drug Administration Modernization Act of 1997, Pub. L. No. 105-115, § 111, 111 Stat. 2296, 2305-09; Best Pharmaceuticals for Children Act, Pub. L. No. 107-109, 115 Stat. 1408 (2002); see also Mylan Labs., Inc. v. Thompson , 389 F.3d 1272, 1276 (D.C. Cir. 2004). Under that law, a drug sponsor that receives pediatric exclusivity is entitled to an additional six months of market exclusivity. AR 1390. This protection, moreover, is sweeping; it applies to all products containing the active moiety that has existing patent protection or exclusivity, and it applies both to patent rights and to the FDAs authority to approve ANDAs for competing products. Id.
Five events must occur for a sponsor to qualify for pediatric exclusivity: (1) the FDA must determine that information relating to the use of [the] drug in the pediatric population may produce health benefits in that population; (2) the FDA must make a written request for pediatric studies; (3) the applicant must agree to that request; (4) the studies must be completed using appropriate formulations for each age group for which the study is requested within [the specified] timeframe; and-most importantly for present purposes-(5) the reports from those studies must be submitted [to] and accepted by the FDA. 21 U.S.C. § 355a(b)(1) (emphasis added). A sponsor may ask the FDA to issue a written request by filing a proposed pediatric study request (PPSR). 21 U.S.C. § 355a(d)(3). Before issuing the written request, the FDA must consult with the sponsor, 21 U.S.C. § 355a(d)(1)(A), and submit the request for review by the Pediatric Review Committee, 21 U.S.C. § 355a(f)(1), (2). That committee includes experts in, among other fields, pediatrics, biopharmacology, chemistry, and the appropriate expertise pertaining to the pediatric product under review. 21 U.S.C. § 355d. When issued, the written request asks the sponsor to conduct pediatric studies within a certain timeframe and to propose pediatric labeling resulting from such studies. 21 U.S.C. § 355a(d)(1)(A).
The written request serves as a yardstick against which the sponsors eligibility for pediatric exclusivity is later measured. Dkt. 65-1 at 16. As the FDA explains, [g]iven the breadth of the benefit available to sponsors who qualify for pediatric exclusivity, the agency generally asks for a full range of studies designed to provide meaningful information regarding use of the drug in all of the pediatric populations in which the drug is likely to be used. Id. at 15-16. The written request also includes specific details regarding study design and endpoints, [the] number of patients to be studied, and study duration. Id. at 16.
After the sponsor completes the studies and submits its reports, the FDA is required to decide within 180 days whether to accept or reject such reports. 21 U.S.C. § 355a(d)(4). The FDA must accept the reports if the sponsors studies satisfy the three exclusive conditions set forth in the statute. In the words of the statute:
The Secretarys only responsibility in accepting or rejecting the reports shall be to determine, within the 180-day period, whether the studies [1] fairly respond to the written request, [2] have been conducted in accordance with commonly accepted scientific principles and protocols, and [3] have been reported in accordance with the requirements of the Secretary for filing.
Id. (emphasis added). The Pediatric Review Committee may review the studies for purposes of making a recommendation on whether the FDA should accept or reject the reports, but it is not required to do so. 21 U.S.C. § 355a(f)(3).
B. Regulatory Background
This case turns on the meaning of the fairly respond requirement, and, it is fair to say, the FDAs approach to this statutory language has [e]volv[ed] over the years. Dkt. 60-1 at 13. Prior to 2001, the FDA apparently required that the sponsor satisfy each and every term of the written request. In Merck & Co. v. FDA , 148 F.Supp.2d 27 (D.D.C. 2001), a drug sponsor challenged that interpretation after the FDA denied its request for pediatric exclusivity. Id. at 30. Judge Robertson concluded that denying pediatric exclusivity for failure to meet a single term of a written request would not be in accordance with the statute. Id. The statute, he explained, plainly does not require compliance with every single provision of a written request, but requires only that a pediatric study fairly respond to a written request. Id. The Court, accordingly, extended its earlier temporary restraining order, which had stayed the effectiveness ... of the FDAs refusal of pediatric exclusivity. Id. at 31.
The FDAs most recent interpretation of the statute is set forth in a letter decision issued by the Deputy Director for Clinical Science, Center for Drug Evaluation and Research on August 2, 2017, resolving Amgens administrative appeal. See AR 1632-50. Under the interpretation set forth in that letter, the fairly respond requirement can be satisfied in two ways. First, [w]hen a sponsor meets the terms of the written request, the resulting studies will fairly respond to the request because studies that are carried out in accordance with the trials plans and objectives, as expressed in the [written request], will generally satisfy the statutory goal of obtaining pediatric use information. AR 1637. Neither party disputes this aspect of the FDAs interpretation. The parties disagreement, instead, centers on the second prong of the test. Under that prong, even where specific terms of the written request are not met, the FDA will nonetheless generally consider the sponsors studies to have fairly responded to the written request if the agency, apply[ing] its scientific expertise, determines that the underlying objectives of the [written request] have ... been met. Id. That is, the studies will be accepted if the FDA determines that the studies yielded information that is clinically meaningful across all age groups and uses cited in the written request. Id.
C. Factual Background
In March 2004, the FDA approved Amgens drug Sensipar, or cinacalcet hydrochloride, for secondary hyperparathyroidism (HPT) in adult patients with chronic kidney disease on dialysis, hypercalcemia in adult patients with parathyroid carcinoma, and hypercalcemia in adult patients with primary HPT who are unable to undergo parathyroidectomy. AR 1403. Several of Amgens patents claim Sensipar, one of which expires on March 8, 2018. Dkt. 65-1 at 17.
Amgen, believing that there was an unmet medical need for the treatment of secondary HPT in children, submitted a Proposed Pediatric Study Request to the FDA in May 2007. AR 18, 38-42. At that time, cinacalcetssafety [and] effectiveness in pediatric patients had not been established. Dkt. 65-1 at 17 (citing AR 14). Amgen, then, submitted a new Proposed Pediatric Study Request in December 2009, stressing that there was a need for pediatric studies because cinacalcet was already being used off-label in a significant portion of the pediatric dialysis patient population. AR 1633-34. In May 2010, after several years of discussions and a pre-clinical study, Dkt. 60-1 at 14, the FDA issued a written request to Amgen, see AR 647. As the agency explained, pediatric studies on cinacalcet were necessary because its efficacy in adults cannot be extrapolated to the pediatric population: secondary HPT progresses differently in children, and cinacalcet poses unique risks to pediatric patients, whose skeletal and vascular system[s] are still developing. AR 648. The written request, accordingly, proposed that Amgen conduct two pediatric studies on the potential use of cinacalcet hydrochloride in the treatment of secondary hyperparathyroidism in children with chronic kidney disease... receiving dialysis. AR 647. The objective of the written request was to obtain information on cinacalcets efficacy, safety, and tolerability in pediatric patients, including pediatric patients ages 28 days to < 6 years. AR 647-48.
Over the next several years, the written request was amended five times to relax the study parameters, reduce the scope of the studies, or expand the ways in which the requested information could be obtained. See AR 730-48, 755-68, 990-1007, 1035-51, 1076-90; see also Dkt. 60-1 at 14-15; Dkt. 65-1 at 18-19. The final-and operative-version of the written request asked Amgen to complete four clinical studies:
Study 1: A single dose [pharmacokinetics/pharmacodynamics (PK/PD) ] study in pediatric patients ages 28 days to < 6 years with chronic kidney disease and secondary hyperparathyroidism receiving dialysis.
Study 2: A 30-week, randomized, double-blind, placebo-controlled, safety and efficacy study with a 30-week, open-label, safety extension in pediatric patients ages 6 years to < 18 years with chronic kidney disease and secondary hyperparathyroidism receiving dialysis. This study will include an assessment of pharmacokinetic (PK) parameters using a sparse sampling design. Study 2 has been terminated early and will be analyzed with available data.
Study 3: A 26-week or time-until-transplantation (whichever comes first), open-label, safety study in pediatric patients ages 28 days to < 6 years ....
Study 4: A 20-week, randomized, open-label, controlled study in pediatric subjects between the ages of 6 and < 18 years , with secondary hyperparathyroidism and chronic kidney disease who are receiving either hemodialysis or peritoneal dialysis.
AR 1080 (emphasis added). Although Study 1 and Study 3 both involved pediatric patients ages 28 days to < 6 years, they focused on different questions. Study 1 examined cinacalcets pharmacokinetics (the drugs movement ... within the body such as absorption, distribution, [and] metabolism) and pharmacodynamics (the characteristics of the action of the drug). Dkt. 60-1 at 15 n.4 (internal quotation marks and citation omitted). Study 3, in contrast, focused on the drugs safety in the youngest pediatric patients. Compared to Study 2, which also examined safety but in older pediatric patients, Study 3 was shorter, smaller[,] [and] of limited scope with a minimum of only 15 completers. Dkt. 65-1 at 19-20; see AR 1063. For a variety of reasons, Amgen struggled to locate an adequate number of patients for Study 3, AR 664-66, but eventually enrolled 18, AR 1159.
In December 2012, a patient enrolled in Study 2 died. AR 840. Following standard protocol, the FDA issued a partial clinical hold, or a temporary suspension, on further testing on pediatric patients with secondary HPT. Id. While the hold was in effect, Amgen and the agency discussed potential next steps. See AR 858-64. Amgen opted to continue the studies, AR 862, and the FDA replaced Study 2 with Study 4, AR 991-92. The hold, however, affected Amgens ability to complete Study 3. As Amgen explains, enrolled patients were not receiving treatment, and five of the eight patients then[-]enrolled in Study 3 discontinued their participation. Dkt. 60-1 at 17. Amgen and the FDA continued to correspond regarding Amgens efforts to complete Study 3. See AR 1391-95.
In late 2015, the FDA rejected Amgens request for a sixth amendment, which would have lowered the minimum number of completers in Study 3 from fifteen patients to four patients-the number of completers in the study available at the time. AR 1338. The agency did not agree that [four] completers ... would allow for an adequate characterization of safety for the intended use and was not willing to further amend the written request to lower the study parameters to fit the amount of data collected. AR 1138-39. Amgen also sought a meeting with the FDA to discuss Study 3 and the submission of Amgens supplemental NDA. AR 1099. The FDA denied Amgens request, asserting that it would not have any more discussion on Study 3 and indicating that Amgens request to meet regarding Amgens supplemental NDA was premature. AR 1102. The agency eventually met with Amgen on September 21, 2016, to discuss the overall cinacalcet pediatric development program. AR 1116.
On November 23, 2016, Amgen submitted its study reports to the FDA, requested pediatric exclusivity, and sought approval for a pediatric indication for Sensipar. AR 1152. The only discrepancy between Amgens studies and the written request was the number of completers for Study 3. AR 1159. The written request required a minimum of 15 patients; Amgen enrolled 18. Id. But only 11 patients exceeded 12 weeks of treatment, and even fewer-just 4 patients-completed the full 26-week study. Id. Nevertheless, Amgen reported, it had collected sufficient data to satisfy the primary objectives of Study 3, which were to evaluate the safety and tolerability of cinacalcet in pediatric patients ages 28 days to < 6 years. AR 1160. In Amgens opinion, its data was sufficient ... to support an indication in that pediatric population. Id.
On May 22, 2017, the FDA denied Amgens request for pediatric exclusivity in a letter decision. AR 1389-98. The agency explained that, in issuing the written request, it sought to characterize the risks of using cinacalcet to treat secondary HPT in children with chronic kidney disease on dialysis. AR 1391. But the FDA found that it could not draw any conclusions about the safety of the drug in a key age group-patients ages 28 days to < 6 years-because of Amgens failure to provide sufficient safety data. AR 1398. This conclusion was based on the totality of safety information Amgen provided, not merely the data generated in Study 3. Id. As the FDA explained, Amgens reports could [have] be[en] considered a fair response to the [written request] as a whole if the companys findings in the aggregate provided an appropriate safety assessment in younger children. Id. Instead, the lack of sufficient safety data on pediatric patients ages 28 days to < 6 years led to the inability to clearly establish the safety profile of the drug ... in accordance with [the] objectives of the amended [written request]. Id.
D. Procedural History
Three days after the FDA issued its decision, Amgen filed this action to compel the FDA to accept Amgens reports and to grant pediatric exclusivity for Sensipar. Dkt. 1 at 2 (Compl. ¶ 1). Amgen claimed that the FDAs interpretation of fairly respond was contrary to the pediatric exclusivity statute under the Administrative Procedure Act (APA), 5 U.S.C. § 701 et seq. , Dkt. 1 at 21-23 (Compl. ¶¶ 50-56); that its denial of pediatric exclusivity for Sensipar was arbitrary and capricious, id. at 29-31 (Compl. ¶¶ 76-88);
and that its application of its standard violated Amgens due process rights, id. at 31 (Compl. ¶¶ 89-90). On the same day, Amgen moved for a temporary restraining order or preliminary injunction, arguing that it might lose the full benefit of its pediatric exclusivity absent injunctive relief. Dkt. 3 at 10. The Court held a hearing on Amgens motion on June 2, 2017. Minute Entry (June 2, 2017). After the hearing, however, the parties agreed that Amgen would seek reconsideration and administrative dispute resolution before the FDA and that the proceedings before the Court would be stayed. Dkt. 14. Based on the parties stipulation, the Court denied Amgens motion for preliminary relief as moot and stayed the case pending completion of the renewed administrative process. Dkt. 15.
On remand, the FDA denied both Amgens request for reconsideration, AR 1484, as well as its appeal of that decision in the FDAs administrative dispute resolution process, AR 1632. During those proceedings, Amgen pressed the same arguments it makes here-that the FDAs interpretation of fairly respond is foreclosed by the statute and that FDAs application of that standard to Amgen violated foundational principles of administrative law and due process. Dkt. 60-1 at 22. In a final letter decision denying Amgens administrative appeal, the agency set forth the interpretation of fairly respond described above. See supra Part I.B. Applying that standard, the FDA affirmed its earlier conclusions that Amgens studies did not fairly respond to the written request because (1) Amgen fail[ed] to carry out Study 3 in accordance with the [written request] and (2) Amgen failed to provide meaningful pediatric use information in children 28 days to < 6 years of age. AR 1648.
The dispute then returned to this Court, where the parties jointly proposed an expedited briefing schedule. Dkt. 24. Before either side moved for summary judgment, four generic drug companies-Teva Pharmaceuticals USA, Inc., Barr Laboratories, Inc., Watson Laboratories, Inc., and Amneal Pharmaceuticals LLC-moved to intervene as defendants, Dkt. 26; Dkt. 33, and the Court granted their motions, see Minute Order (Aug. 15, 2017); Dkt. 61. In addition, Amgen moved to complete or supplement the administrative record with several sets of documents that Amgen asserted were considered by the FDA in denying Amgen pediatric exclusivity. Dkt. 38. The Court denied Amgens motion in part from the bench at a hearing held on September 20, 2017, and directed that the parties meet and confer regarding the remaining portion of Amgens motion. See Minute Entry (Sept. 20, 2017). After the parties were unable to reach an agreement, they set forth their respective positions in a further filing, Dkt. 53, and the Court denied the remainder of Amgens request, see Minute Order (Oct. 11, 2017); Dkt. 61.
Three motions are now before the Court: Amgens motion for summary judgment, Dkt. 60, the FDAs cross-motion, Dkt. 65, and the intervenor-defendants joint cross-motion, Dkt. 63. The Court held a hearing on those motions on January 11, 2018. See Minute Entry (Jan. 11, 2018). Because Amgen has represented that a key patent[ ] covering Sensipar is due to expire on March 8, 2018, Dkt. 1 at 4-5 (Compl. ¶ 9), the Court has expedited its resolution of the pending motions.
II. LEGAL STANDARD
Under Federal Rule of Civil Procedure 56, summary judgment is ordinarily available if the movant demonstrates that there is no genuine dispute as to any material fact and that, based on the uncontested facts, the movant is entitled to judgment as a matter of law. Fed. R. Civ. P. 56(a). In the unique context of a case brought under the APA, however, the district court sit[s] as an appellate tribunal, Marshall Cty. Health Care Auth. v. Shalala , 988 F.2d 1221, 1222-23 (D.C. Cir. 1993), to decide as a matter of law [whether] the agency action is supported by the administrative record and is otherwise consistent with the APA standard of review, Coal. for Common Sense in Govt Procurement v. United States , 821 F.Supp.2d 275, 280 (D.D.C. 2011) ; see also Citizens to Preserve Overton Park, Inc. v. Volpe , 401 U.S. 402, 415, 91 S.Ct. 814, 28 L.Ed.2d 136 (1971) ; Sw. Merch. Corp. v. NLRB , 53 F.3d 1334, 1341 (D.C. Cir. 1995). In short, it is the role of the administrative agency to resolve factual issues and to arrive at a decision that is supported by the administrative record, while it is the role of the district court to determine whether or not as a matter of law the evidence in the administrative record permitted the agency to make the decision it did. Hi-Tech Pharmacal Co. v. FDA , 587 F.Supp.2d 13, 18 (D.D.C. 2008).
III. ANALYSIS
Amgen argues that the FDAs decision denying it pediatric exclusivity for Sensipar is unlawful and must be set aside for three reasons. First, Amgen contends that the FDAs interpretation of fairly respond violate[s] the pediatric exclusivity statute. Dkt. 60-1 at 25. Second, it argues that the FDAs denial was arbitrary and capricious because the agency treated Amgen differently from similarly situated entities and refused to consider evidence on the challenges of enrolling participants in Study 3. Id. Finally, Amgen contends that the FDAs application of its fairly respond standard to Amgen without any notice contravened both due process and APA principles. Id. The FDA responds that its interpretation of fairly respond is entitled to deference under Chevron, U.S.A., Inc. v. Natural Resources Defense Council, Inc. , 467 U.S. 837, 104 S.Ct. 2778, 81 L.Ed.2d 694 (1984) ; that it correctly and fairly applied the standard in rejecting Amgens studies; and that Amgen was fully aware of the FDAs interpretation. Dkt. 65-1 at 11-12. The Court will consider each argument in turn.
A. Statutory Claim
According to Amgen, the FDAs interpretation of fairly respond is incompatible with the text of the pediatric exclusivity statute. Dkt. 60-1 at 25. As explained above, that interpretation recognizes two ways in which a sponsors studies may fairly respond to the written request. First, if the sponsors studies meet the specific terms of the written request, the studies fairly respond to the written request. AR 1637. Second, even if the studies deviate from the specific terms of the written request, the FDA will nonetheless conclude that they fairly respond to the written request if they yield clinically meaningful information across all age groups and uses cited in the written request. Id. Because all agree that Study 3 did not meet the specific terms of the FDAs written request, the first prong of the test has no bearing on this case. Instead, the focus is on the second prong. It is this prong of the test that Amgen contends is both narrower than the statute mandates and incompatible with the limited role Congress accorded the FDA. Dkt. 60-1 at 26.
To determine whether an agencys construction of its authorizing statute is permissible, the Court looks to the two-step inquiry set forth in Chevron.
Safari Club Intl v. Zinke , 878 F.3d 316, 326 (D.C. Cir. 2017). The Court must first ascertain whether Congress has directly spoken to the precise question at issue, and, in doing so, must employ the ordinary tools of statutory construction. City of Arlington v. FCC , 569 U.S. 290, 296, 133 S.Ct. 1863, 185 L.Ed.2d 941 (2013) (quoting Chevron , 467 U.S. at 842, 104 S.Ct. 2778 ). If Congress has spoken directly to the question, that is the end of the matter because the Court-and the agency-must give effect to the unambiguously expressed intent of Congress. Chevron , 467 U.S. at 842-43, 104 S.Ct. 2778. But if, instead, the statute is ambiguous, the Court must defer to the agency construction so long as it is reasonable. Safari Club , 878 F.3d at 326.
1. Chevron Step Zero
As an initial matter, Amgen disputes that the Chevron framework applies to the FDAs fairly respond interpretation. Dkt. 60-1 at 26-30. For Chevron to govern, the agency must have acted pursuant to congressionally delegated authority to make law and with the intent to act with the force of law. Safari Club , 878 F.3d at 326 (citing United States v. Mead Corp. , 533 U.S. 218, 226-27, 229, 121 S.Ct. 2164, 150 L.Ed.2d 292 (2001) ); see Menkes v. U.S. Dept of Homeland Sec. , 637 F.3d 319, 331 (D.C. Cir. 2011). Often referred to as Chevron step zero, this threshold inquiry delimits the types of agency actions that qualify for Chevron deference. Amgen offers a number of arguments why the FDAs interpretation of fairly respond falls outside Chevron s ambit, but none are persuasive.
First , Amgen argues that Congresss use of the adjective only to describe the FDAs responsibility in accepting or rejecting a sponsors reports, 21 U.S.C. § 355a(d)(4), signals that Congress did not intend to delegate rulemaking authority concerning the meaning of fairly respond to the FDA, Dkt. 60-1 at 27. The statute, in relevant part, reads as follows: [t]he [FDAs] only responsibility in accepting or rejecting the reports shall be to determine ... whether the studies fairly respond to the written request and fulfill the other two statutory criteria. 21 U.S.C. § 355a(d)(4) (emphasis added). Amgen is partly correct-but only partly. It is correct that the word only narrow[s] ... the agencys discretion by expressly limit[ing] what the agency can and cannot do. Dkt. 60-1 at 27. But it is incorrect that this limitation has anything to do with the FDAs authority to interpret the phrase fairly respond. Indeed, just the opposite is true. The statute accords the agency the responsibility ... to determine ... whether the studies fairly respond to the written request. 21 U.S.C. § 355a(d)(4) (emphasis added). Without construing the meaning of fairly respond, the FDA cannot discharge that statutory responsibility. It follows, moreover, that-to the extent fairly respond is ambiguous, which is the sole question presented at Chevron step one-Congress must have intended to confer interpretative authority on the FDA.
Second , Amgen asserts that a court does not defer to an agencys interpretation under Chevron if the matter does not implicate[ ] the agencys unique technical or scientific expertise. Dkt. 60-1 at 27. This misunderstands the relevance of expertise to the Chevron framework. Expertise can come into play at two levels. First, Congress might opt to delegate interpretive power to an agency because, in Congresss judgment, the agency possesses valuable expertise. But, if it does so, the justification for judicial deference to an agencys interpretation is the congressional delegation itself, not the Courts assessment of the agencys expertise. As the Supreme Court explained in City of Arlington v. FCC , 569 U.S. 290, 133 S.Ct. 1863, 185 L.Ed.2d 941 (2013) :
Chevron is rooted in a background presumption of congressional intent: namely, that Congress, when it left ambiguity in a statute administered by an agency, understood that the ambiguity would be resolved, first and foremost, by the agency, and desired the agency (rather than the courts) to possess whatever degree of discretion the ambiguity allows.
Id. at 296, 133 S.Ct. 1863 (quoting Smiley v. Citibank (South Dakota), N.A. , 517 U.S. 735, 740-41, 116 S.Ct. 1730, 135 L.Ed.2d 25 (1996) ); see also Mead , 533 U.S. at 229, 121 S.Ct. 2164 (explaining that when circumstances indicate that Congress expect[ed] the agency to speak with the force of law in addressing a statutory ambiguity, a reviewing court has no business rejecting an agencys exercise of its generally conferred authority to resolve [that] statutory ambiguity); AKM LLC v. Secy of Labor , 675 F.3d 752, 765 (D.C. Cir. 2012) (Brown, J., concurring) (It is by Congresss delegation of authority to the agency to elucidate a specific provision of the statute that an agencys interpretation is deserving of the courts deference. (quoting Chevron , 467 U.S. at 843-44, 104 S.Ct. 2778 ) ); Antonin Scalia, Judicial Deference to Administrative Interpretations of Law, 1989 Duke L.J. 511, 514 (If it is ... the constitutional duty of the courts to say what the law is, we must search for something beyond relative competence as a basis for ignoring that principle when agency action is at issue.). In short, the Chevron framework is premised on the theory that a statutes ambiguity constitutes an implicit delegation from Congress to the agency to fill in the statutory gaps, FDA v. Brown & Williamson Tobacco Corp. , 529 U.S. 120, 159, 120 S.Ct. 1291, 146 L.Ed.2d 121 (2000), and that rationale stands regardless of whether filling the relevant gap requires a PhD. Second, courts may at times accord heightened deference to the scientific or technical expertise of an agency. See A.L. Pharma, Inc. v. Shalala , 62 F.3d 1484, 1490 (D.C. Cir. 1995) ; Sanofi-Aventis U.S. LLC v. FDA , 842 F.Supp.2d 195, 211 (D.D.C. 2012). But that does not mean that Chevron is inapplicable in other cases. Amgen cites no authority for its sweeping contention that Chevron applies only in cases that require specialized expertise, nor is the Court aware of any. To the contrary, Chevron is commonly applied in cases involving no greater call for expertise than at issue here. See, e.g. , City of Arlington , 569 U.S. at 294, 301, 133 S.Ct. 1863.
Amgen relies on King v. Burwell , --- U.S. ----, 135 S.Ct. 2480, 192 L.Ed.2d 483 (2015), but that case is fully consistent with the delegation-based justification for Chevron . In King, Chevron did not apply because the extraordinary nature of the case, which implicated billions of dollars in government spending and millions of people, suggested that Congress did not intend to delegate interpretive authority to the agency. Id. at 2488-89. Although the Court noted that it was especially unlikely that Congress would have delegated the power to decide such a question of deep economic and political significance that [was] central to th[e] statutory scheme, id. (citation omitted), to an agency that lacked any expertise in crafting the relevant type of policy, this reasoning serves only to reaffirm that delegation-not expertise-is what matters. Here, in contrast to King , Amgen offers no plausible reason to doubt that Congress intended to delegate interpretive authority to the FDA.
Third , Amgen argues that the FDAs interpretation of fairly respond
lacks the traditional hallmarks of deference. Dkt. 60-1 at 28; see Mead , 533 U.S. at 227, 121 S.Ct. 2164. According to Amgen, the FDAs pediatric exclusivity determinations have been ad hoc, freewheeling, and non-public. Dkt. 60-1 at 28. As a result, Amgen concludes, Chevron does not cover the agencys decision in this case, which was set forth in the letter decisions denying Amgen pediatric exclusivity. Id. The Court is, once again, unpersuaded. The D.C. Circuit has expressly held that the FDAs interpretations of the [Federal] Food, Drug, and Cosmetic Act adopted in letter rulings are to be evaluate[d] ... under the familiar two-part Chevron framework. Teva Pharm. USA, Inc. v. Sebelius , 595 F.3d 1303, 1315 (D.C. Cir. 2010) ; see also Mylan Labs. , 389 F.3d at 1279-80 ; Abbott Labs. v. Young , 920 F.2d 984, 986-89 (D.C. Cir. 1990) ; Mylan Pharm., Inc. v. Sebelius , 856 F.Supp.2d 196, 208 (D.D.C. 2012) ; Hi-Tech Pharmacal , 587 F.Supp.2d at 19. As the FDA explains, pediatric exclusivity decisions are generally unpublished because they often contain confidential commercial ... information. Dkt. 65-1 at 34. But their nonpublic nature does not deprive these determinations of those relatively formal administrative procedure[s] that tend[ ] to foster the fairness and deliberation that should underlie a pronouncement of legal interpretation. Fogo De Chao (Holdings) Inc. v. U.S. Dept of Homeland Sec. , 769 F.3d 1127, 1137 (D.C. Cir. 2014) (quoting Mead , 533 U.S. at 230, 121 S.Ct. 2164 ). This case, moreover, highlights the relative formal[ity] of the FDAs administrative procedure[s], id. ; the FDA issued three detailed letter decisions setting forth its analysis of the statute and the relevant facts, and it allowed Amgen to be heard before the agency issued its original decision, its reconsideration decision, and its appeal decision, see AR 1389-99; AR 1483-96; AR 1632-50.
Finally , Amgen invokes Encino Motorcars, LLC v. Navarro , --- U.S. ----, 136 S.Ct. 2117, 195 L.Ed.2d 382 (2016), for the proposition that Chevron deference is not warranted where the regulation is procedurally defective-that is, where the agency errs by failing to follow the correct procedures in issuing the regulation. Id. at 2125 (quoting Mead , 533 U.S. at 227, 121 S.Ct. 2164 ); see Dkt. 60-1 at 28-29. Amgen argues that the FDAs construction of the statute is procedurally unsound because it was not announced publicly and because the agency did not provide a reasoned explanation for its unexplained about-face from its pre- Merck interpretation. Dkt. 60-1 at 28-29. The Court is unpersuaded.
The holding in Encino Motorcars was premised on the concern that longstanding policies may have engendered serious reliance interests that must be taken into account. Encino Motorcars , 136 S.Ct. at 2126 (quoting FCC v. Fox Television Stations, Inc. , 556 U.S. 502, 515, 129 S.Ct. 1800, 173 L.Ed.2d 738 (2009) ). But Amgen cannot claim such reliance interests. The flip-flop that Amgen apparently targets was the FDAs change in position following this Courts decision in Merck & Co. v. FDA , 148 F.Supp.2d 27 (D.D.C. 2001). That change, however, expanded the agencys interpretation of fairly respond. Before Merck , the FDA required sponsors to meet all the terms of the written requests to qualify for pediatric exclusivity, while, after Merck , the FDA has accepted imperfect reports of studies that nonetheless met the objectives of the written requests. See AR 1643. It is difficult to see how the FDAs relaxation of the standard could have frustrated any serious reliance interest that Amgen may have had.
The FDAs change in position, moreover, hardly came out of the blue; it followed a judicial decision concluding that the FDAs prior reading of the fairly respond requirement was [in]consistent with the statutory standard. Merck , 148 F.Supp.2d at 30. And, although Amgen correctly notes that the FDAs intervening decisions were not released publicly, there is nothing surprising in the FDAs conclusion that studies fairly respond to a written request if they comply with its terms or meet its goals by providing clinically meaningful information across the relevant uses and age groups. Finally, Amgens contention that the FDAs current reading of the statute constitutes an unexplained about-face from [its] prior understanding, Dkt. 60-1 at 29, is belied by the administrative record. In addressing Amgens arguments, the FDA explained the basis for its reading of the statute, and it explained that the test that it has now adopted is consistent with the holding in Merck , which requires the agency to consider the results of a sponsors studies as a whole. AR 1485; see also AR 1636-38.
2. Chevron Step One
Under Chevron step one, the Court must first determine whether ... Congress has directly spoken to the precise question at issue. Vill. of Barrington v. Surface Transp. Bd. , 636 F.3d 650, 659 (D.C. Cir. 2011) (quoting Chevron , 467 U.S. at 842, 104 S.Ct. 2778 ). This inquiry requires that the Court ask whether Congress has unambiguously foreclosed the agencys statutory interpretation. Id. (quoting Catawba Cty. v. EPA , 571 F.3d 20, 35 (D.C. Cir. 2009) ); see also Animal Legal Def. Fund, Inc. v. Perdue , 872 F.3d 602, 616 (D.C. Cir. 2017) [hereinafter ALDF ] (We thus must determine whether the agencys [interpretation] is unambiguously foreclosed by the statute. (citation omitted) ); Otsuka Pharm. Co. v. Price , 869 F.3d 987, 995 (D.C. Cir. 2017) (same). If the agencys interpretation violate[s] Congresss precise instructions or exceed[s] the statutes clear boundaries, then the agencys interpretation is unlawful. Vill. of Barrington , 636 F.3d at 660.
The Court begin[s], of course, with the statutory text. ALDF , 872 F.3d at 616 (citing Maslenjak v. United States , --- U.S. ----, 137 S.Ct. 1918, 1924, 198 L.Ed.2d 460 (2017) ). The pediatric exclusivity provision sets forth an intricate, multi-step process for determining when a sponsors pediatric research justifies a valuable, six-month extension of the sponsors market exclusivities and patent rights. The FDA, tasked with effectuating this process, occupies center stage in the statutory scheme. Among other duties, the agency is charged with deciding whether to accept or reject the sponsors reports of [its] studies. 21 U.S.C. § 355a(d)(4). Fulfilling this responsibility requires the FDA to determine ... whether the studies fairly respond to the written request. Id. As noted, the agency has found that a sponsors study reports constitute a fair response if they either meet the specific terms of the written request or meet its objectives by yielding information [that] is clinically meaningful across all age groups and uses. AR 1637.
The statute provides important guidance by specifying that the requirement can be satisfied by something short of perfect compliance: the sponsor need only fairly respond to the written request. See Merck , 148 F.Supp.2d at 30-31. If perfect compliance were required, the adverb fairly would serve no purpose, and that result would risk running headlong into the rule against superfluity. Lockhart v. United States , --- U.S. ----, 136 S.Ct. 958, 966, 194 L.Ed.2d 48 (2016). But this is where the text runs out. The statute does not define what constitutes a fair response, and, as the FDA argues, fairly respond is an inherently ambiguous term. Dkt. 65-1 at 30. To take just one source, the Oxford English Dictionary suggests that the term fairly has two different senses. Fairly, adv., Oxford English Dictionary (2018) [hereinafter OED]. The first relat[es] to amount, extent, or degree, suggesting a more quantitative assessment. Id. Amgens preferred definitions-moderately, passably, and reasonably well-fall within this category. Dkt. 60-1 at 31; see also Fairly, Merriam-Webster Dictionary (2018) (to a full degree or extent); Fairly, Collins English Dictionary (2018) (to quite a large degree). The second sense, however, draws on a more substantive conception of the term: [i]n a fair manner, so as to be fair. OED. This sense of the word fairly includes definitions such as [b]y proper or legal means; legitimately, [i]n accordance with what is right or just[;] ... with good reason, rightfully, and-perhaps most relevant here-[i]n a proper or suitable manner; appropriately, fittingly. Id. The FDA interprets the word fairly in a manner that draws on both senses: how much of a response there was as well as the quality of the response. Dkt. 65-1 at 31. The statute does not dictate one sense of the word fairly over the other, nor does it indicate which of the competing meanings within each sense (for instance, moderately versus to a full degree) Congress intended. What is clear, however, is that the FDAs clinically meaningful information interpretation is not unambiguously foreclosed by the statutory text. There is no textual or other evidence that the statute prohibits the agency from considering the extent to which the data responds to the goals of the study.
Amgen offers a number of counterarguments, none of which compels a different conclusion. First, Amgen contends that fairly respond necessarily means answer reasonably well, Dkt. 60-1 at 31, and that-when combined with the limiting term only-this shows that Congress unambiguously foreclosed the FDA from adopting a results[-]oriented standard, Dkt. 74 at 33 (Tr. 33:10-11, :21-23). But, for the reasons explained above, the word only does not modify the phrase fairly respond; it merely means that the FDA should not add requirements to those that Congress specified. Reading the phrase fairly respond to mean answer reasonably well, moreover, does nothing to clarify the standard; answer reasonably well is just as ambiguous as fairly respond. For purposes of Chevron step one, the question is whether Congress left a gap for the agency to fill, and substituting the phrase answer reasonably well for fairly respond neither fills the existing gap nor demonstrates that the FDAs reading of the statute is unambiguously foreclosed.
When asked at oral argument to describe how the FDA should decide whether [a] response was reasonable, Dkt. 74 at 21 (Tr. 21:12-14), Amgen offered that the agency must assess reasonableness in light of the volume of what ... [was] put in front of the agency as well as what the sponsor did in order to achieve that data, id. at 24 (Tr. 24:17-19). In other words, Amgen explained, reasonableness includes both the extent of the data [provided] and the amount of the effort [undertaken]. Id. at 27 (Tr. 27:10-12). Amgen concludes that, under that standard, it did everything it could ... to satisfy the terms of the [written] request, id. at 24 (Tr.
24:23-25), and it is therefore entitled to pediatric exclusivity. An effort-based interpretation of fairly respond, however, finds no warrant in the statutory text. The question is whether the study reports -not the sponsor-fairly respond to the written request. In other words, the statute focuses on the studies themselves, not the length of time the studies took, nor the number of attempts needed to complete the studies, nor the expenses incurred in carrying out the studies. An effort-based interpretation of fairly respond is untenable.
Amgen offers an additional reading of the statute, which includes a textual anchor and builds on the FDAs goal-focused approach. Under this interpretation, a sponsors studies suffice if they generate any information that results in a labeling change mandated by 21 U.S.C. § 355a(j). That provision provides:
If ... the [FDA] determines that a pediatric study ... does or does not demonstrate that the drug [in question] is safe and effective, including whether such study results are inconclusive, in pediatric populations or subpopulations, the [FDA] shall order the labeling of such product to include information about the results of the study and a statement of the [FDAs] determination.
Id. According to Amgen, because the results of its studies were added to the Sensipar label pursuant to § 355a(j), the FDA was not free to second-guess the congressional determination that the results were meaningful. Dkt. 60-1 at 32.
Amgens argument suffers from a number of flaws. First, § 355a(j)s labeling requirement was enacted ten years after Congress imposed the fairly respond requirement, compare Food and Drug Administration Amendments Act, Pub. L. No. 110-85, § 502, 121 Stat. 823, 876-90 (2007) (adding 21 U.S.C. § 355a(j) ), with Food and Drug Administration Modernization Act, Pub. L. No. 105-115, § 111, 111 Stat. 2296, 2305-09 (1997) (adding fairly respond requirement), and there is no evidence that Congress intended § 355a(j) to amend or clarify the meaning of its earlier enactment. Second, the FDA has explained that it has interpreted § 355a(j) to require labeling changes regardless of whether the studies yielded any clinically meaningful results; rather, according to the FDA, § 355a(j) applies mechanically to all such studies. Understood in this light, Amgens argument proves too much. It would mean, among other things, that the fairly respond requirement is meaningless and that the FDA must grant pediatric exclusivity to a sponsor that is utterly unsuccessful in responding to a written request. At oral argument, for example, Amgen acknowledged that this argument would mean that it would have fairly responded to the FDAs written request even if only one patient had completed Study 3. Dkt. 74 at 90 (Tr. 90:10-15).
Finally, Amgen asserts that the FDAs clinically meaningful information standard would undermine the incentive structure Congress envisioned when it provided for pediatric exclusivity. See Dkt. 60-1 at 34-36. This contention, however, bears more on the reasonableness of the FDAs interpretation than on whether the statute unambiguously forecloses the FDAs approach. The Court will therefore consider Amgens purposive argument at Chevron s second step.
Because the phrase fairly respond is ambiguous, Chevron teaches that Congress has implicitly delegated the authority to interpret this term to the FDA. ALDF , 872 F.3d at 617. That conclusion is particularly apt, moreover, because-as this case demonstrates-the meaning attached to that phrase implicates the type of policy-laden judgment that is better left to the politically accountable executive branch than to the unelected judiciary. See Chevron , 467 U.S. at 864, 104 S.Ct. 2778 ([P]olicy arguments are more properly addressed to legislators or administrators, not to judges.). Construing fairly respond is, in short, precisely the type of statutory gap-filling that involves difficult policy choices that agencies are better equipped to make than courts. ALDF , 872 F.3d at 617 (quoting Natl Cable & Telecomms. Assn v. Brand X Internet Servs. , 545 U.S. 967, 980, 125 S.Ct. 2688, 162 L.Ed.2d 820 (2005) ).
3. Chevron Step Two
The next question is whether the FDA has reasonably explained how the permissible interpretation it chose is rationally related to the goals of the statute. Vill. of Barrington , 636 F.3d at 665 (quoting AT & T Corp. v. Iowa Utils. Bd. , 525 U.S. 366, 388, 119 S.Ct. 721, 142 L.Ed.2d 835 (1999) ). The Courts review at this stage is highly deferential. Id. (quoting Natl Rifle Assn of Am. v. Reno , 216 F.3d 122, 137 (D.C. Cir. 2000) ). But this deference is not absolute, Mylan Labs. Ltd. v. FDA , 910 F.Supp.2d 299, 306 (D.D.C. 2012), and it must give way in the absence of reasoned decisionmaking, Motor Vehicle Mfrs. Assn v. State Farm Mut. Auto. Ins. Co. , 463 U.S. 29, 52, 103 S.Ct. 2856, 77 L.Ed.2d 443 (1983) ; see also Fox v. Clinton , 684 F.3d 67, 74-75 (D.C. Cir. 2012) ; Tripoli Rocketry Assn v. Bureau of Alcohol, Tobacco, Firearms, & Explosives , 437 F.3d 75, 77 (D.C. Cir. 2006).
The FDAs explication of its clinically meaningful information standard expressly links that standard to the underlying goal of the pediatric exclusivity statute. The agencys final decision on Sensipar describes both the purpose of the pediatric exclusivity statute and how the FDAs interpretation furthers that goal: the statutes purpose is to encourage [sponsors to] conduct ... clinical studies that would result in a public health benefit for pediatric patients, and, in particular, to address the lack of meaningful information about pediatric uses of drugs, which impairs the ability of health care practitioners and pediatric patients to appropriately use such drugs. AR 1636. The FDA works to achieve this goal by drafting each written request, with input from the Pediatric Review Committee, to maximize the potential to elicit such information. AR 1637. The FDA then assesses the study reports against the objectives of the written request. Id. Accordingly, even if the specific terms of the [written request] are not met, the FDA will apply its scientific expertise to determine [whether] the objectives of the [written request] have nevertheless been met, and, if so-consistent with the goals of the ... statute-the FDA will generally consider the sponsors studies to have fairly responded to the [written request]. Id. (emphasis omitted).
All three of the FDAs decisions in this matter note the significance of meaningful labeling changes as indicia of whether the sponsors studies provided clinically meaningful information. The agencys initial decision observed, for example, that the FDA considers whether the submission enables the agency to approve pediatric labeling (including negative pediatric labeling) for all of the age groups and indications cited in the written request. AR 1391. The FDAs reconsideration decision elaborated on this standard. See AR 1485. Because the FDA draft[s] each [written request] to elicit all of the information needed for use in all relevant pediatric populations, those objectives will be served where a sponsors studies comply perfectly with the written request or where the information suffic[es] to enable the [FDA] to approve meaningful labeling.
Id. Finally, the FDAs appeal decision reiterated that the purpose of a [written request] is to elicit information that would ... lead to the addition of pediatric use information to the drugs labeling. AR 1639; see also AR 1637 (noting that the FDA drafts each [written request] to maximize the potential to elicit clinically meaningful information, as expressed in the drugs labeling). Indeed, Amgen itself stressed in its PPSR that [t]he overall objective of [its] proposed program [was] inclusion of data in the Pediatric Use section of the label. AR 24.
In other words, the goal of the pediatric exclusivity statute is to elicit information that may produce health benefits in children. 21 U.S.C. § 355a(b)(1). The agency has determined that this objective is best served by an interpretation of fairly respond that allows the agency to accept a sponsors reports when (1) there is perfect compliance or (2) the studies generate information that is clinically meaningful, i.e. , information that practitioners would find useful. AR 1637. Although this interpretation may not be the best one, it is eminently reasonable in light of the the goals of the [statute] and is rationally related to those objectives. AT & T Corp. , 525 U.S. at 388, 119 S.Ct. 721.
Amgen offers three counterarguments. It first contends that the FDAs clinically meaningful information standard goes beyond the limited assessment Congress empowered the agency to make. Dkt. 60-1 at 37. But, for the reasons discussed at the first step of the Chevron inquiry, Amgen has not offered a persuasive account of the limited assessment that it believes Congress contemplated. It is true that Congress limited the FDA to considering the requirements identified in the statute, but it did not limit the FDAs authority to consider whether those requirements were satisfied. See supra Part III.A.1.
Second, Amgen notes that the FDA initially had only 90 days to decide whether to accept or reject a sponsors reports, and it argues that the original allotment of 90 days would not have afforded the FDA enough time to conduct its clinically meaningful information inquiry. Dkt. 60-1 at 37 (citing 21 U.S.C. § 355a(d)(3) (2003) ). Given the fact that the FDA participates in the ongoing process-and, indeed, formulates the written request and any amendments to it-that contention is far from convincing. And, the fact that Congress subsequently extended the time allowed for the FDAs review, if anything, supports the conclusion that Congress did not intend for the decision whether to accept or reject a sponsors reports to be a mechanical one.
Finally, as noted above, Amgen contends that the FDAs interpretation is at odds with congressional intent because it injects deep uncertainty into the process and thus radically undermines the terms of Congresss bargain. Dkt. 60-1 at 34-35. Even assuming that Amgen is correct that [t]he central feature of this statutory bargain is that the sponsor knows the terms of th[e] bargain before it ... decide[s] whether to conduct the pediatric studies, Dkt. 60-1 at 34 (emphasis omitted), it is far from clear that Amgens reading of the statute provides greater certainty or predictability than the FDAs. Under the FDAs construction of the statute, a sponsor can earn six months of additional exclusivity if its studies either (1) meet the terms of the written request or (2) yield clinically meaningful information that achieves the specified objectives of the written request. Either way, the sponsors success can be measured against the prescribed terms and goals of the written request. Under Amgens proposed construction of the statute, in contrast, the FDA would be required to assess the quantity of information provided and the sponsors effort without any specified benchmark or standard. Similarly, it is not obvious that Amgens reading of the statute is likely to yield more information about pediatric uses of drugs. Although Amgen might be correct that sponsors may be more likely to submit PPSRs to the FDA with a more forgiving interpretation of the statute, they may also be less likely to complete their studies in the manner contemplated by the written requests. It is not, of course, the Courts role to decide whether Amgens account of the relevant incentives is more or less compelling than the FDAs, but only to determine whether the FDAs understanding of the statutory scheme is a reasonable one. For the reasons explained above, the Court concludes that it is.
Because the term fairly respond is ambiguous and because the FDAs interpretation of that term is reasonable, the Court must defer to the FDAs statutory construction.
B. Arbitrary and Capricious Claim
Under the Administrative Procedure Act, the Court must set aside the FDAs denial of pediatric exclusivity if that decision is arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law. 5 U.S.C. § 706(2)(A). In applying this standard, the Court must consider whether the FDA relied on factors which Congress has not intended it to consider, entirely failed to consider an important aspect of the problem, [or] offered an explanation for its decision that runs counter to the evidence before the agency. State Farm , 463 U.S. at 43, 103 S.Ct. 2856. Although the Court must assess whether the FDA examine[d] the relevant data and articulate[d] a ... rational connection between the facts found and the choice made, it may not substitute its [own] judgment for that of the [FDA]. Id. Deference to the agencys determination, moreover, is especially warranted where, as here, the decision at issue requires a high level of technical expertise. Safari Club , 878 F.3d at 325-26 (quoting Marsh v. Or. Nat. Res. Council , 490 U.S. 360, 377, 109 S.Ct. 1851, 104 L.Ed.2d 377 (1989) ).
The FDA concluded that Amgens reports did not fairly respond to the written request because the data from Study 3 and the other sources did not yield clinically meaningful information on cinacalcets safety-an objective of the written request-in one of the specified age groups, pediatric patients ages 28 days to < 6 years. AR 1647-48. The agency looked both to the results of Study 3 and the rest of Amgens data before concluding that Amgen had failed to obtain the safety data called for in the [written request] and, thus, the needed information on cinacalcets use in children. AR 1638. With respect to Study 3, the FDA explained that [t]he choice of a minimum of 15 patients reflect[ed] a reasonable balance between study feasibility and data sufficiency. AR 1645. But the data that Amgen generated was not sufficient to evaluate the primary endpoint of safety in the younger population because there were only 4 completers. Id. Another problem was that almost no participants provid[ed] safety data at effective dose levels; by the twenty-fourth week of the twenty-six-week study, data on a key metric of cinacalcets efficacy was not available for 95% of the participants. Id. In addition, the FDA concluded that it could not rely on additional safety data gathered in other studies to inform safety in the intended use for the youngest pediatric population. AR 1647. As the foregoing discussion demonstrates, the FDA drew on its expertise and articulated a rational connection between the facts and its decision to deny pediatric exclusivity for Sensipar.
Amgen offers three reasons why, in its view, the FDAs denial of pediatric exclusivity was arbitrary and capricious: (1) its studies satisfied the fairly respond requirement, even under the FDAs reading of the statute; (2) the FDA arbitrarily refused to consider evidence of Amgens efforts to enroll additional patients in Study 3; and (3) the FDA treated Amgen differently than two similarly situated entities, without offering a reasoned basis for doing so. The first two arguments fail, but the third-Amgens claim of inconsistent treatment-warrants further consideration from the agency.
1. Satisfaction of the FDAs Standard
Amgen contends that it achieved meaningful labeling, Dkt. 60-1 at 38, because, pursuant to 21 U.S.C. § 355a(j)s labeling requirement, Sensipars label was updated with information from Amgens studies, Dkt. 60-1 at 38-39. For the reasons discussed above, the Court is unpersuaded that § 355a(j) is coterminous with the FDAs clinically meaningful information standard, see supra Part III.A.2; see also Dkt. 65-1 at 42, and more to the point for present purposes, the FDA has rejected the linkage that Amgen posits, and the FDAs reading of the relevant provisions is eminently reasonable. As the FDA has explained, § 355a(j) mandates the inclusion of all results of studies undertaken in response to a written request, regardless of whether those results are clinically meaningful. The agencys decision to require labeling changes for Sensipar pursuant to § 355a(j), accordingly, does not mean that Amgens studies achieved meaningful labeling for purposes of the fairly respond requirement.
2. The FDAs Refusal To Consider Evidence of Amgens Effort
According to Amgen, the FDA acted arbitrarily by refusing to accept and consider a briefing document ... describ[ing] the efforts Amgen ... made enrolling pediatric patients for Study 3. Dkt. 60-1 at 50 (quoting AR 1096). Amgen further asserts that the FDA erred in claiming that Amgen could have achieved the minimum number of patients for Study 3 with greater effort. AR 1646; see Dkt. 60-1 at 51. Although it is true, as Amgen argues, that an agency acts arbitrarily by fail[ing] to consider an important aspect of the problem, State Farm , 463 U.S. at 43, 103 S.Ct. 2856, that did not occur here. For the reasons already discussed, the FDA has reasonably interpreted the fairly respond requirement in a manner that does not encompass a sponsors efforts . Thus, information on Amgens work on enrollment is not an important aspect of the fairly respond determination because the FDA did not deny pediatric exclusivity based on Amgens efforts (or lack thereof).
3. Inconsistent Treatment
Amgen also argues that the FDAs decision should be set aside because it is inconsistent with the approach the FDA has taken in similar cases. Dkt. 60-1 at 45-50. When an agency treat[s] similarly situated parties differently, it must provide an adequate explanation to justify the disparate outcomes. Burlington N. & Santa Fe Ry. Co. v. Surface Transp. Bd. , 403 F.3d 771, 776 (D.C. Cir. 2005) ; see also Cty. of Los Angeles v. Shalala, 192 F.3d 1005, 1022 (D.C. Cir. 1999) ; Transactive Corp. v. United States , 91 F.3d 232, 237 (D.C. Cir. 1996) ; Petroleum Commcns, Inc. v. FCC , 22 F.3d 1164, 1172 (D.C. Cir. 1994) ; New Orleans Channel 20, Inc. v. FCC , 830 F.2d 361, 366 (D.C. Cir. 1987). Without such a reasoned explanation, the agencys action is arbitrary and capricious and cannot be upheld. Burlington N. & Santa Fe , 403 F.3d at 777. Relying on this rule, Amgen contends that the FDAs decisions granting pediatric exclusivity for Orencia (abatacept) and Ortho Tri-Cyclen (ethinyl estradiol; norgestimate) are inconsistent with its denial for Sensipar, and that the agency has failed to provide a legitimate reason for treating Sensipar differently. Dkt. 60-1 at 45 (quoting Bracco Diagnostics, Inc. v. Shalala , 963 F.Supp. 20, 27 (D.D.C. 1997) ). As explained below, the Court agrees with Amgen about one of these precedents, but not the other.
As an initial matter, the Court is unconvinced that the FDA, without explanation, applied a more onerous standard in rejecting Amgens studies than it applied in accepting the studies submitted by Orencias sponsor, Bristol-Myers Squibb (BMS). Amgen is correct that the FDA granted pediatric exclusivity for Orencia even though one of BMSs studies-involving the intravenous use of Orencia in patients ages 6 to 17 years, AR 1727-did not meet the terms of the written request. AR 1492. As the FDA explained to Amgen in its reconsideration decision, however, it granted pediatric exclusivity because the overall data from the studies BMS conducted provided a sufficient safety database to draw supportable conclusions about the drugs safety in the relevant pediatric age groups and was sufficient to label the product for pediatric use. Id. The difference between the BMS and Amgen studies, moreover, was marked: BMS submitted data from 164 of the required 180 patients, whereas Amgen submitted data from only 4 of the required 15 patients in Study 3. Id. In the FDAs expert opinion, BMSs studies produced robust clinical trial data, while Amgens studies, in contrast, did not yield an interpretable evaluation of product safety. Id.
Notwithstanding these important differences, id. , Amgen contends that the FDAs Orencia decision is inconsistent with its Sensipar decision for two reasons. First, Amgen argues that the FDA considered the overall data from the two Orencia studies to assess whether they yielded clinically meaningful information, but for Sensipar the FDA restricted itself to analyzing Study 3 in isolation. Dkt. 60-1 at 50. The record, however, contradicts that characterization of the FDAs approach to Sensipar. The agency found that [d]ata from Study 3 were not sufficient to evaluate ... safety in the younger population, AR 1645, and that this shortage was not compensated by additional safety data gathered in children < 6 years old in Study 1 (single dose study), a retrospective observational study, and a prospective cohort registry study, AR 1647. The FDA thus considered overall data in both cases.
Second, Amgen contends that the FDA rejected its study reports because they did not result in meaningful labeling changes but accepted BMSs reports even though BMSs studies did not result in a labeling change. Dkt. 60-1 at 48. The fact that the FDA did not require a labeling change for Orencia, however, does not mean that the BMSs studies did not yield meaningful labeling information or, indeed, information ... sufficient to label the product for pediatric use. AR 1492. Rather, as all agree, the FDA had previously approved labeling information regarding the intravenous use of the drug in pediatric patients. See AR 1736, 1773-74. The FDA reasonably concluded that an additional study was nonetheless warranted, and it reasonably concluded that the results of that study and the overall data confirmed that the product was safe for use by patients ages 6 to 17 years. AR 1491-92. Although Amgen suggests that this confirmation must not have been clinically meaningful because the FDA, under its own regulations, required substantial evidence to approve the prior label, Dkt. 67 at 27-28, that argument asks that the Court tread on the agencys expert assessment of whether a further study was warranted in the first place.
For Ortho Tri-Cyclen, however, Amgen has a point. In its reconsideration decision for Sensipar, the FDA distinguished the agencys grant of exclusivity for Ortho Tri-Cyclen on the ground that the studies conducted by Ortho Tri-Cyclens sponsor, Johnson & Johnson, AR 1888, met all of the terms of the written request. AR 1493; cf. AR 1485. As Amgen argues, however, it is-at best-unclear from the administrative record whether that premise is correct.
The written request asked Johnson & Johnson to conduct two studies:
Study 1: A randomized, double-blind, placebo-controlled study to examine the efficacy and safety of Ortho Tri-Cyclen ® in the treatment of adolescent patients with anorexia nervosa (AN).
Study 2: A pharmacokinetics (PK) study to assess the single-dose and steady-state or alternatively, population PK of ethinyl estradiol (EE), norgestrel (NG), and norelgestromin (NGMN) in pediatric patients with [anorexia].
AR 1871. The objective of Study 1 was to assess the effect of Ortho Tri-Cyclen on bone mineral density (BMD) of the lumbar spine and hip in patients with anorexia. Id. The objective of Study 2 was to assess the single-dose and steady-state or, alternatively, population [pharmacokinetics] of [norelgestromin ], [norgestrel ], and [ethinyl estradiol ] in pediatric patients with [anorexia]. Id. The written request set forth more detailed requirements for both studies. As relevant here, Study 1 specified the following design parameters: one year in duration and approximately 120 adolescent women ages 12 through 17 years with anorexia as defined by the Diagnostic and Statistical Manual of Mental Disorders, fourth edition (DSM-IV). AR 1872. Amgen contends that many of the women enrolled in Study 1 did not meet ... the DSMIV diagnostic criteria for anorexia. Dkt. 60-1 at 47 (quoting AR 1916).
In its Sensipar reconsideration decision, the FDA offers little support for its conclusion that Johnson & Johnson satisfied the terms of Study 1. The agency acknowledges that it was unable to locate the Boards decision granting exclusivity to Johnson & Johnson, and asserts, without explanation, that the deciding official reviewed other relevant documents and determined that the sponsors studies met the terms of the written request. AR 1493. In its brief before this Court, moreover, the FDA identifies only one possible source supporting its conclusion: in a clinical review prepared after the FDA had granted Johnson & Johnsons request for pediatric exclusivity, a medical reviewer noted that he had previously recommended that [Johnson & Johnson] receive pediatric exclusivity, since the requested study was conducted in agreement with the [w]ritten [r]request. AR 1885. This document reflects the reviewers recommendation on exclusivity, but not the analysis or conclusions of the deciding official. And the reviewer did not explain what he meant by conducted in agreement with the [w]ritten [r]equest. Given the deferential standard of review, however, this might ordinarily suffice to sustain the FDAs decision. See, e.g. , Envtl. Def. Fund, Inc. v. Costle , 657 F.2d 275, 283 (D.C. Cir. 1981). But other material in the administrative record casts doubt on whether Johnson & Johnson, in fact, met the terms of the written request with respect to Study 1.
From what the Court can glean from the record, Johnson & Johnson enrolled 146 randomized and 123 treated subjects, all of whom were female and aged 10 to 17 years at screening. AR 1918. Following a May 2005 clinical review, however, the FDA found that the majority of the 123 subjects treated ... did not meet either the DSM-IV diagnostic criteria for anorexia nervosa or the DSM-IV diagnostic criteria modified by the sponsor for anorexia nervosa. AR 1916; see also AR 1921 (noting that only 77 of the 123 patients had the word anorexia listed in their medical histories). In particular, 76 patients had a baseline Body Mass Index (BMI) at or above the 10th percentile for age and [therefore] should not have been enrolled into the study. AR 1948. And, at least in part because a significant number of treated patients did not me[e]t the DSM-IV criteria, the FDA reviewer consider[ed] the data ... insufficient to address safety concerns regarding the use of Ortho Tri-Cyclen in subjects with anorexia. AR 1937.
Based on this record, Amgen argues that the FDA granted pediatric exclusivity even though the sponsors study reports neither met the terms of the written request nor generated meaningful labeling. Dkt. 60-1 at 45. Although the FDA addresses some of Amgens arguments, it has not responded to Amgens contention that the majority of the 123 patients treated in Study 1 did not meet the DSM-IV diagnostic criteria for anorexia nervosa, as required by the written request. There may be an answer to Amgens contention. It is possible, for instance, that the FDA granted Johnson & Johnson pediatric exclusivity based on the mistaken belief that Study 1 was conducted in full compliance with the terms of the written request, and that the failure to enroll patients meeting the DSM-IV criteria was discovered only after the fact. Or it may be that Johnson & Johnsons study did, in fact, comply with the requirement. Or the FDA may have some other basis for distinguishing, disregarding, or abandoning the Ortho Tri-Cyclen precedent. If so, however, the agency must explain that rationale and identify the relevant evidence for its conclusions in the administrative record. Because the FDA has yet to do so, the Court concludes that the agencys decision is-at least in this one respect-arbitrary and capricious and that a limited remand is necessary. See Lilliputian Sys., Inc. v. Pipeline & Hazardous Materials Safety Admin. , 741 F.3d 1309, 1313 (D.C. Cir. 2014) ([A]n agency cannot treat similarly situated entities differently unless it support[s] th[e] disparate treatment with a reasoned explanation and substantial evidence in the record. (quoting Burlington N. & Santa Fe , 403 F.3d at 777 ) ).
This disposition raises one final question: whether to remand the matter with or without vacatur of the FDAs denial of pediatric exclusivity. The Court must consider two factors: the likelihood that [the] deficiencies ... can be redressed on remand, even if the agency reaches the same result, and the disruptive consequences of vacatur. Black Oak Energy, LLC v. FERC , 725 F.3d 230, 244 (D.C. Cir. 2013) (quoting Allied-Signal v. Nuclear Regulatory Commn , 988 F.2d 146, 150-51 (D.C. Cir. 1993) ). The parties, however, have not addressed the question of vacatur-nor is it obvious what practical consequences, if any, turn on the question given that the FDA denied Amgens request for pediatric exclusivity and that setting aside that decision would not accord Amgen the ultimate relief that it seeks. Rather than decide the issue without input from the parties, the Court will order the parties to appear for a status conference (1) to address whether the limited remand required by this decision should be with or without vacatur, and (2) to develop a schedule for the FDA promptly to address the Ortho Tri-Cyclen precedent on remand.
With respect to Amgens arbitrary and capricious claim, the Court, accordingly, will grant summary judgment to the FDA in part and to Amgen in part, and will remand the matter to the FDA for further consideration of its Ortho Tri-Cyclen decision.
C. Notice Claims
Amgen argues that the FDAs application of its previously unannounced interpretation of fairly respond to Amgens request for pediatric exclusivity violated the fair notice principle of the APA and the due process clause and constituted impermissible retroactive rulemaking. Although these contentions overlap in substantial part, the Court will address each in turn.
1. Fair Notice
With respect to its fair notice claim, Amgen asserts that it lacked [a]dvance knowledge of the FDAs interpretation of fairly respond and that it had no way to predict at the time it agreed to the written request that the agency would adopt such an interpretation. Dkt. 60-1 at 42. This lack of notice, Amgen continues, had real consequences for Amgen because the company spent vast time and resources undertaking pediatric testing. Id. at 42-43. As explained below, Amgens argument fails on both the law and the facts.
As to the law, Amgens contention that the APA (or due process) precludes an agency from applying an interpretation of a statute or regulation that cannot be discerned in advance with ascertainable certainty, Dkt. 60-1 at 41 (citing Gen. Elec. Co. v. EPA , 53 F.3d 1324, 1328-29 (D.C. Cir. 1995) ), overstates the law. The ascertainable certainty standard applies where ... a party is deprived of property, or where sanctions are drastic. Darrell Andrews Trucking, Inc. v. Fed. Motor Carrier Safety Admin. , 296 F.3d 1120, 1130 n.8 (D.C. Cir. 2002) (quoting Gen. Elec. , 53 F.3d at 1328-29 ). It precludes an agency from imposing a criminal or civil penalty or sanction on a regulated party without fair notice. See, e.g. , Darrell Andrews Trucking , 296 F.3d at 1130 ; Gen. Elec. , 53 F.3d at 1328-29. And, it precludes an agency from rejecting a filing as untimely or for failing to comply with some other filing requirement if the agency has not provided fair notice of the time limit or filing requirement. See, e.g. , PMD Produce Brokerage Corp. v. USDA , 234 F.3d 48, 52-53 (D.C. Cir. 2000). But Amgen has failed to identify any precedent beyond those contexts in which the courts have applied the ascertainable certainty requirement to agency adjudicative actions involving questions of statutory or regulatory interpretation. It is common, moreover, for agencies to set forth their statutory interpretations in the adjudicative process. Against that backdrop, the implication of Amgens argument-that the ascertainable certainty standard applies to all adjudications in which a party has a substantial stake or a reliance interest-would substantially rework the regulatory process. And it would do so for no good reason: Chevron and the overarching arbitrary and capricious standard already prevent agencies from engaging in the type of Kafkaesque endeavors that Amgen fears. See Dkt. 60-1 at 41.
Amgens argument also fails on the facts. The ascertainable certainty rule prevents agencies from taking regulated parties by surprise. See Gen. Elec. , 53 F.3d at 1329-30 (citing Rollins Envtl. Servs., Inc. v. EPA , 937 F.2d 649, 651 (D.C. Cir. 1991) ; Satellite Broad. Co. v. FCC , 824 F.2d 1, 2 (D.C. Cir. 1987) ; Gates & Fox Co. v. OSHRC , 790 F.2d 154, 155 (D.C. Cir. 1986) ). Here, however, Amgen knew that its reports would need to fairly respond to the written request, see 21 U.S.C. § 355a(d)(4), Amgen knew what the written request required, and Amgen knew what the written request sought to attain, AR 1076-89. Amgen was aware, moreover, that the FDA had previously required that the requested studies meet [every] single term of [the] written request. Merck , 148 F.Supp.2d at 30. And, Amgen knew that one district court had held that perfect compliance was not required and that, instead, it was sufficient if the stud[ies] as a whole [provide] a fair response to the written request. Id. The fact that the FDA subsequently adopted a more generous reading of the statute-and expanded the universe of study responses that it considered sufficient-does not constitute unfair surprise.
The administrative record, moreover, confirms that Amgen was not blind to the relevant requirements. Among other things, when Amgen realized that it would be unable to meet the terms of the written request, it sought to amend that request-it did not simply rest on the assumption that its best efforts or the limited results that it did obtain would suffice. AR 1091-92. In addition, when Amgen submitted its study report and requested pediatric exclusivity, AR 1152, it argued that pediatric exclusivity was warranted because
sufficient data has been collected in the overall cinacalcet pediatric development program ... to satisfy the primary objectives of this study , which were to evaluate the safety and tolerability of cinacalcet in pediatric patients ages 28 days to < 6 years and to characterize the PK profile in pediatric patients.
AR 1160 (emphasis added). Although not a perfect match, Amgens argument for why it deserved pediatric exclusivity closely reflects the FDAs understanding that the studies must produce results sufficient to meet the objectives of the written request. AR 1637.
Finally, Amgen relies on the following statement from the FDAs website, which it argues is inconsistent with the FDAs interpretation: Pediatric exclusivity is not tied to approval of labeling containing information on pediatric use based on the studies conducted. Dkt. 60-1 at 40 (quoting Dkt. 60-2 at 3 (emphasis omitted) ). The website, however, goes on to explain that the FDAs decision whether to grant pediatric exclusivity is based on the agencys assessment of whether the [sponsors] studies were conducted in accordance with the terms of the [w]ritten [r]equest. Dkt. 60-2 at 3. That statement is entirely consistent with the first prong of the test that the FDA now espouses: the FDA will grant pediatric exclusivity to a sponsor that properly execute[s] the requested studies, even if the sponsors studies fail to result in pediatric use information-i.e. , information useful in labeling. AR 1637. The statement that Amgen identifies from the FDA website, accordingly, can be faulted-if at all-for addressing only the first prong of the current test, and not adding that a sponsor can also qualify for pediatric exclusivity if it fails to properly execute[ ] the studies but, nonetheless, achieves results that satisfy the objectives of the studies. That omission does nothing to advance Amgens fair notice argument. The fact that the FDA subsequently applied a more generous test than the one articulated on its website could not have unfairly surprised Amgen. Amgen would hardly be better off if the FDA had relied solely on the test alluded to on its website.
The Court, accordingly, will grant the FDA summary judgment on Amgens APA claim and due process claim based on a purported lack of fair notice.
2. Retroactivity
Amgens contention that the FDAs determination violated the principles of retroactive rulemaking, Dkt. 60-1 at 43, fares no better. According to Amgen, those principles protect regulated entities from the surprise of having newly developed standards applied to them in the course of an adjudication, id. , and the FDAs current reading of fairly respond constitutes an abrupt departure from the previously announced rule and from the reasonably ascertainable meaning of the statute, id. at 44. This argument misunderstands how principles of retroactivity apply to agency adjudications.
Unlike the rules applicable to notice-and-comment rulemaking, see Bowen v. Georgetown Univ. Hosp. , 488 U.S. 204, 208-09, 109 S.Ct. 468, 102 L.Ed.2d 493 (1988), [r]etroactivity is the norm in agency adjudications no less than in judicial adjudications, Am. Tel. & Tel. Co. v. FCC , 454 F.3d 329, 332 (D.C. Cir. 2006). To be sure, judicial hackles are raised when an agency alters an established rule defining permissible conduct which has been generally recognized and relied on throughout the industry that it regulates. Id. (quoting NLRB v. Majestic Weaving Co. , 355 F.2d 854, 860 (2d. Cir. 1966) (Friendly, J.) ). Beyond those limited circumstances, however, courts will set aside new interpretations of existing law adopted in agency adjudications only if retroactive application of the new interpretation would work a manifest injustice. Verizon Tel. Cos. v. FCC , 269 F.3d 1098, 1109 (D.C. Cir. 2001) (citation omitted); see also Qwest Servs. Corp. v. FCC , 509 F.3d 531, 539 (D.C. Cir. 2007) ; Am. Tel. , 454 F.3d at 332 ; Clark-Cowlitz Joint Operating Agency v. FERC , 826 F.2d 1074, 1081 (D.C. Cir. 1987) (en banc).
In determining that Amgens studies did not fairly respond to the written request, the FDA did not jettison a generally recognized rule that Amgen-or any other regulated entity-relied upon. Indeed, the only earlier articulation of the governing rule that Amgen has identified is the perfect compliance rule discussed-and rejected-in the Merck case. 148 F.Supp.2d at 30. After Merck was decided, there may have been some uncertainty regarding the relevant standard, but Amgen cannot plausibly contend that the FDA altered an established and generally recognized rule when, in relevant respects, it adopted the rule suggested by the Merck decision. Id. (holding that the key question is whether the study as a whole is a fair response to the written request). Even more to the point, Amgen cannot plausibly contend that it relied on the FDAs earlier, more restrictive reading of the statute. If there was some other established and generally recognized prior articulation of the standard that, if applied here, would have required the FDA to accept Amgens studies, Amgen has yet to identify it.
This leaves the question whether retroactive application of the test recognized in the FDAs decisions in this matter would result in a manifest injustice. As the D.C. Circuit has explained, it has not been entirely consistent in enunciating a standard to determine when to deny retroactive effect in cases involving new applications of existing law, clarifications, and additions resulting from adjudicatory actions. Verizon , 269 F.3d at 1109-10 (citing a five-factor balancing test adopted in Clark-Cowlitz , 826 F.2d at 1081-86, a three-factor test set forth in Dist. Lodge 64 v. NLRB , 949 F.2d 441, 447-49 (D.C. Cir. 1991), and other cases ... jettison[ing] the multi-pronged balancing approaches altogether). The most recent cases from the D.C. Circuit have eschewed a formal application of a five- or three-factor test in favor of a more flexible inquiry. See Qwest Servs. , 509 F.3d at 539-40 ; Consol. Edison Co. of N.Y. v. FERC , 315 F.3d 316, 323-24 (D.C. Cir. 2003). Two principles, however, are clear-and dispositive here. First, a mere lack of clarity in the law does not make it manifestly unjust to apply a subsequent clarification of that law to past conduct. Qwest Servs. , 509 F.3d at 540. Indeed, [c]larifying the law and applying that clarification to past behavior are routine functions of adjudication. Id. Second, the manifest injustice standard is satisfied only if the affected party has detrimentally relied on the established legal regime. Consol. Edison , 315 F.3d at 323 (citing Clark-Cowlitz , 826 F.2d at 1081 ; Hatch v. FERC , 654 F.2d 825, 835 (D.C. Cir. 1981) ). It is not enough to show that the affected party might have relied on an assumption regarding the state of law; the relevant question is whether it reasonably relied on settled law contrary to the rule established in the adjudication. Qwest Servs. , 509 F.3d at 540.
For the reasons discussed above, the FDAs retroactive application of its clinically meaningful information standard did not work a manifest injustice. Indeed, if anything, it is Amgens proposed standard that lacks any precedential pedigree. The truth is, the FDA relied on an overly restrictive test before Merck ; the district court in that case correctly observed that the FDAs prior test could not be squared with the statutory text; and, in this case, the FDA articulated a standard that is consistent with the statutory text and the Merck decision. There is nothing unfair, much less manifestly unjust, about the FDAs application of that standard to Amgen.
Accordingly, the Court will grant summary judgment to the FDA with respect to Amgens retroactivity claim.
CONCLUSION
For the reasons stated above, it is hereby ORDERED that Amgens motion for summary judgment, Dkt. 60, is DENIED in part and GRANTED in part; and it is further
ORDERED that the FDAs motion for summary judgment, Dkt. 65, and the intervenor-defendants motion for summary judgment, Dkt. 63, are DENIED in part and GRANTED in part; and it is further
ORDERED that the case is remanded to the FDA for the limited purpose of addressing whether the agencys prior decision granting pediatric exclusivity for Ortho Tri-Cyclen is consistent with its decision denying pediatric exclusivity for Sensipar and, if not, whether there is a reasoned explanation for the disparate outcomes.
SO ORDERED .
An active moiety is the molecule or ion ... responsible for the physiological or pharmacological action of the drug substance. 21 C.F.R. § 314.3(b) ; see Amarin Pharm. , 106 F.Supp.3d at 199.
Available at http://www.oed.com/view/Entry/67727.
Available at https://www.merriam-webster.com/dictionary/fairly.
Available at https://www.collinsdictionary.com/us/dictionary/english/fairly.
Two of these patients were 10 or 11, yielding a total of 121 treated subjects ages 12 through 17 years. See AR 1951.
Of the 123 treated patients with anorexia nervosa, 61 received active treatment and 62 received placebos. AR 1907.