OPINION
Plaintiffs-appellants Margaret Gaeta, as guardian ad litem for A.G., a minor child, and Augustine Gaeta (collectively, “the Gaetas”) appeal the district court’s grant of summary judgment in favor of Perrigo Pharmaceutical Company. The district court determined that the Gaetas’ state law failure-to-warn claims against Perrigo, a manufacturer of a generic version of ibuprofen, were preempted under federal law. Subsequently, the Supreme Court decided
Wyeth v. Levine,
— U.S. -,
Since then, two Courts of Appeals and all of the district courts to consider the issue have held otherwise, using the rationale underlying Levine to find that federal law does not preempt state law failure-to-warn claims against generic manufacturers, provided there is no “clear evidence” that the FDA would not have approved the proposed stronger warning. We agree and hold that the district court erred in applying federal preemption. Accordingly, we reverse and remand.
I
On June 3, 2004, A.G. had two benign moles removed in a surgical procedure. During the procedure, A.G. received Halo-thane, an anesthetic known to be “hepatotoxic” — that is, to cause liver failure in certain circumstances. After the surgery, A.G. was discharged with a prescription for ibuprofen and instructions to take one 400mg tablet once every six hours as needed for pain. Instead, A.G.’s parents purchased Perrigo’s generic over-the-counter (“OTC”) ibuprofen at 200mg per tablet. For the next four days, A.G. took 400mg of the generic ibuprofen every six to eight hours.
On June 11, 2004, A.G. developed a fever and was seen by his pediatrician, who prescribed prescription-strength ibuprofen (400mg). However, A.G.’s condition continued to worsen, and on June 13, 2004, he was referred to the emergency room with a diagnosis of septic shock, dehydration, and liver failure. He was later transferred to Stanford University Hospital for a liver transplant, which took place on June 15, 2004. A.G. also developed other complications, and he eventually required amputation of necrotic tissue on his fingers and toes.
The Gaetas filed suit against Perrigo and several other manufacturers of generic ibuprofen, alleging defective design, defective marketing, breach of express and implied warranty, negligence and gross negligence, and deceit by concealment. 1 *1228 Prevalent in all of the Gaetas’ claims is the allegation that the generic manufacturers failed to warn prescribing physicians and consumers of the increased risk of acute liver injury and renal (i.e., kidney) failure when ibuprofen is taken concurrently with other drugs known to be hepatotoxic.
Perrigo moved for summary judgment on preemption grounds, arguing that the Gaetas’ state law failure-to-warn claims conflicted with FDA regulations relating to the labeling and marketing of generic drugs. The district court agreed, and concluded that the Gaetas’ claims were preempted because a generic manufacturer could not comply with the heightened state law warning requirements without running afoul of the FDA regulations requiring generic drug labels to conform to the approved labeling for brand name drugs. The district court granted summary judgment in favor of Perrigo, and the Gaetas appealed.
The Supreme Court subsequently decided
Levine,
— U.S.-,
II
We review de novo an order granting summary judgment.
Lopez v. Smith,
Ill
This appeal presents an issue of first impression for our court. We must determine what effect, if any, the Supreme Court’s decision in Levine has on the question whether applicable FDA regulations preempt state tort law claims for inadequate labeling against generic — as opposed to brand name — manufacturers. In resolving this question, we consider a brief history of federal drug regulation and labeling.
A. The FDA’s Regulation of Drugs
In the 1930’s, Congress became “increasingly concerned about unsafe drugs and fraudulent marketing,”
Levine,
A less demanding approval process applies to manufacturers seeking to market generic drugs. In 1984, Congress passed *1229 the Hatch-Waxman Amendments to the FDCA, which provided that once a brand name drug’s NDA is approved and the drug is officially listed by the FDA, any manufacturer may seek permission to market a generic version of that drug by submitting an abbreviated NDA (“ANDA”). See Drug Price Competition and Patent Term Restoration Act of 1984, Pub.L. No. 98-417, 98 Stat. 1585 (1984). Under the Hatch-Waxman Amendments, generic manufacturers need not repeat the clinical work of their brand name counterparts, but rather must establish that except for enumerated differences irrelevant here, their drug is the “same as” the brand name drug that has already been approved by the FDA as to active ingredients, route of administration, dosage form, strength, and conditions of recommended use specified on the label. 21 U.S.C. § 355(j)(2)(A). By avoiding unnecessary duplication of previously-performed clinical trials, Congress sought to accelerate the availability of low-cost drugs, thereby resulting in significant cost savings to the American public. 2
ANDA applicants must also show that the labeling proposed for a new generic drug is the “same as” the labeling approved for the listed drug. 21 U.S.C. § 355(j)(2)(A)(v), (j)(4)(G). At any time after a new generic drug is approved, the FDA reserves the right to withdraw approval if it determines that the generic drug’s labeling is “no longer consistent” with that of the listed drug. 21 C.F.R. § 314.150(b)(10). Moreover, the FDCA prohibits all manufacturers from distributing a “misbranded” drug, 21 U.S.C. § 331(a)-(b), including a drug whose “labeling is false or misleading in any particular.” See 21 U.S.C. § 352(a). The FDA has enforcement mechanisms to ensure that drugs with misleading labels are taken off the market. See 21 U.S.C. §§ 333, 355(e).
B. The Supreme Court’s Decision in Wyeth v. Levine
In
Levine,
the plaintiff, Diana Levine, brought suit against a drug manufacturer, Wyeth, when she developed gangrene after receiving an IV-push injection of Phenergan, Wyeth’s brand name for an antihistamine used to treat nausea.
The Supreme Court upheld the trial court’s refusal to overturn on preemption grounds the jury’s verdict in favor of Levine. Id. at 1204.
Wyeth contended it would have been impossible for it to comply with the state-law duty to modify Phenergan’s labeling without violating federal law.
Id.
at 1196. The Court rejected this argument, concluding that because FDA regulations permit drug manufacturers to make certain changes to their labels without prior FDA approval, Wyeth could have met its state-law obligation to provide additional warnings without violating FDA labeling requirements.
Id.
at 1196-99. Specifically, the Court determined that Wyeth could have utilized the FDCA’s changes being effected (“CBE”) regulation, which per
*1230
mits drug manufacturers to change a label, without prior FDA approval, to “add or strengthen a contraindication, warning, precaution, or adverse reaction,” 21 C.F.R. § 314.70(c)(6)(iii)(A) (2004), or to “add or strengthen an instruction about dosage and administration that is intended to increase the safe use of the drug product,” 21 C.F.R. § 314.70(c)(6)(iii)(C).
Levine,
Next, the Court concluded there was no merit to Wyeth’s contention that Levine’s state tort claims were preempted because they interfered with Congress’ purpose to entrust the FDA with making drug labeling decisions. Id. at 1199. In doing so, the Court noted that Congress had repeatedly declined to preempt state law in the field of prescription drugs. Id. at 1200. The Court also concluded that the FDA’s unilateral assertion of broad preemption power in this area, see 71 Fed. Reg. 3922, 3934-35 (Jan. 24, 2006), was entitled to no weight. Id. at 1200-04. According to the Court, because manufacturers have “superior access to information” about their drugs than does the FDA, especially in the post-marketing phase as new risks emerge, they “bear primary responsibility for their drug labeling at all times.” Id. at 1202.
The focal issue in this appeal is whether the Court’s holding in Levine— that the federal regulatory regime governing pharmaceuticals does not preempt state law failure-to-warn claims against brand name manufacturers — extends with equal force to claims against generic manufacturers.
3
As explained below, today we join the Fifth and Eighth Circuits in concluding that, while not dispositive,
Levine
does foreshadow a similar disposition in this case.
See Demahy v. Actavis, Inc.,
C. Preemption Analysis
In considering a federal preemption defense, we are guided by two important considerations. First, “ ‘the purpose of Congress is the ultimate touchstone in every pre-emption case.’ ”
Levine,
Under the Supremacy Clause, U.S. Const, art. VI, cl. 2, Congressional intent to preempt state law can either be expressed in statutory language or implied from the scheme of federal regulation.
Hillsborough Cnty., Fla. v. Automated Med. Labs., Inc.,
In the present case, Perrigo contends the Gaetas’ claims are conflict preempted because it is impossible for Perrigo to comply with both the state-law duties to warn and the federal regulatory regime governing generic drugs. Alternatively, Perrigo contends that the Gaetas’ state law claims are conflict preempted because they obstruct the full accomplishment of the purposes and objectives of Congress in enacting the Hatch-Waxman Amendments. We reject both contentions.
1. There is no impossibility of compliance.
Impossibility preemption is “a demanding defense.”
Levine,
We agree with the Gaetas, and with our two sister circuits, that the FDCA provides generic manufacturers with at least three separate mechanisms by which they can discharge their state-law duty to warn of additional risks associated with their products: (a) the CBE process approved by the Supreme Court in Levine; (b) the “prior approval” process; and (c) by asking the FDA to send “Dear Doctor” warning letters to health care professionals.
Initially, there is no dispute between the parties that the Hatch-Waxman Amendments require an ANDA
applicant
to use a drug label that is the “same as” that approved for the listed drug.
See
21 U.S.C. § 355(j)(2)(A)(v), (j)(4)(G). The only dispute is whether ANDA
holders
must similarly comply with that requirement
after
their applications have been approved. Perrigo contends that they do and points to 21 C.F.R. § 314.150(b)(10), which allows the FDA to withdraw approval if the agency finds that the drug’s labeling is “no longer consistent” with that for the listed drug, and 21 U.S.C. § 352(a), which prohibits the manufacture and distribution of any “misbranded” drug. However, the fact that a generic drug’s label must remain “consistent” with that for the listed drug does not mean that the two labels must be “identical.” In other words, just because a generic drug’s label has stronger warnings than those on the label of its brand name counterpart does not mean the two labels lack consistency. For example, the Supreme Court in
Levine
found it “difficult to accept” that the FDA would bring an enforcement action against a manufacturer for strengthening a warning on a drug’s label.
Indeed, the regulatory framework makes clear that generic manufacturers, just like their brand name counterparts, must take specific steps when they learn of new risks associated with their products. *1232 Thus, both sets of manufacturers must record and report to the FDA certain adverse effects. See 21 C.F.R. § 314.80(a), (c) (NDA holders); 21 C.F.R. § 314.98(a) (ANDA holders). Similarly, both sets of manufacturers must submit annual reports that include, inter alia, a “brief summary of significant new information from the previous year that might affect the safety, effectiveness, or labeling of the drug product” and a “brief description of actions the applicant has taken or intends to take as a result of this new information, for example, submit a labeling supplement, add a warning to the labeling, or initiate a new study.” 21 C.F.R. § 314.81(b)(2)(i) (NDA holders); 21 C.F.R. § 314.98(c) (ANDA holders).
Based on these adverse reports, drug manufacturers “shall” revise then-drug labeling to include a warning “as soon as there is reasonable evidence of an association of a serious hazard with a drug; a causal relationship need not have been proved.” 21 C.F.R. § 201.57(e) (2004).
4
And even though the FDA is the final arbiter of whether any such labeling revision is appropriate, the “primary responsibility” for the label’s adequacy always remains with the drug manufacturer.
Levine,
i. A generic manufacturer can utilize the CBE process to make changes to its label without any prior approval by the FDA.
Generally speaking, FDA approval is necessary before a manufacturer may change a drug label. 21 C.F.R. § 314.70(b)(2)(v)(A). As one exception, however, the CBE provision allows a drug manufacturer to make a label change that becomes effective immediately upon the FDA’s receipt of the supplemental application for the change. 21 C.F.R. § 314.70(c)(6)(iii). A drug manufacturer can utilize the CBE process to strengthen its warnings when doing so is necessary “to reflect newly acquired information.” 21 C.F.R. § 314.70(c)(6)(iii)(A), (C). As the Court explained in
Levine,
in this context, the “newly acquired information” is not limited to new data, but “also encompasses ‘new analyses of previously submitted data.’ ”
Nothing in the text of the Hatch-Wax-man Amendments forbids an ANDA holder from utilizing the CBE process. Indeed, the opposite is true. The CBE provision is contained in 21 C.F.R. § 314.70, which is located in Subpart B of the Regulations (entitled, “Applications”) and which admittedly deals only with applications for the listed drugs. However, § 314.70 is expressly made applicable to ANDA holders by operation of 21 C.F.R. § 314.97, which is located in Subpart C of the Regulations (entitled, “Abbreviated Applications”) and provides that ANDA applicants “shall comply with the requirements of §§ 314.70 and 314.71 regarding the submission of supplemental applications and other changes to an approved abbreviated application” (emphasis added). 5
*1233
All but one of the courts to consider this issue after
Levine
have concluded that the CBE process is available to generic manufacturers on the same terms as to brand name manufacturers.
6
Indeed, except for the district court’s decision in this case, Perrigo cannot point to any
post-Levine
decision concluding otherwise.
7
Neither can Perrigo point to any authoritative statement from the FDA to the contrary. While previously Perrigo could rely on the FDA’s assertion that “under existing preemption principles, FDA approval of labeling under the act ... preempts conflicting or contrary State law,” 71 Fed.Reg. 3922, 3934, that pronouncement is entitled to no weight after
Levine. See
CBE changes are not available for generic drugs approved under an abbreviated new drug application under 21 U.S.C. 355(j). To the contrary, a generic drug manufacturer is required to conform to the approved labeling for the listed drug. See 21 CFR 314.150(b)(10); see also 57 FR 17950, 17953, and 17961.
73 Fed.Reg. 2848, 2849 n.1 (Jan. 16, 2008). As Perrigo itself concedes, the final version of the rule omits this footnote’s language.
See generally
73 Fed.Reg. 49603 (Aug. 22, 2008). Having been abandoned, the FDA’s earlier position is “deprived of all claim to deference[ ] by the fact that it is no longer the agency’s position.”
Riegel v. Medtronic, Inc.,
Perrigo’s arguments in opposition are not persuasive. For example, Perrigo argues that because it has never received, nor attempted to withhold, any information suggesting the use of its product contributed to or caused liver damage, “there was nothing [for it] to report to the FDA to support plaintiffs’ proposed label change.” Underlying the Gaetas’ claims, however, are allegations that Perrigo should have followed — but did not — the same record keeping and reporting of adverse drug experiences post-marketing that brand name manufacturers must undertake. See 21 C.F.R. § 314.98. As part of that record keeping, the FDA requires ANDA holders to “develop written procedures for the surveillance, receipt, evaluation, and reporting of postmarketing adverse drug experiences to FDA.” See 21 C.F.R. §§ 314.80(b), 314.98(a). And if any new information becomes available, the FDA requires ANDA holders to report what actions they have taken or intend to -take as a result of this information, “for example, submit a labeling supplement, add a warning to the labeling, or initiate a new study.” 21 C.F.R. § 314.81(b)(2)©; 21 C.F.R. § 314.98(c).
Similarly, Perrigo argues that any claim that it failed to fulfill its duty to supply information to the FDA is a question for the FDA and not the court, and as such is preempted under
Buckman Co. v. Plaintiffs’ Legal Comm.,
ii. A generic manufacturer can also utilize the “prior approval” process to propose a labeling change to the FDA that, if accepted, would be imposed uniformly on both sets of manufacturers.
Even were the CBE process unavailable to generic manufacturers, nothing in the FDCA or the Hatch-Waxman Amendments prohibits such a manufacturer from proposing a label change through the “pri- or approval” process. See 21 C.F.R. § 314.70(b)(2)(v). Unlike the CBE process, the “prior approval” process requires the FDA’s approval of the supplemental application before the change can be effected. Id. Moreover, by using the prior approval process, a generic manufacturer would not have to worry about its labeling *1235 not being “consistent” with that of the listed drug because, if the FDA were to accept the proposed change, it would be imposed uniformly on both sets of manufacturers. See 57 Fed.Reg, 17950, 17961 (Apr. 28, 1992).
Indeed, it appears the FDA itself envisioned the possibility that ANDA holders would utilize the “prior approval” process to suggest new warnings to the FDA. Thus, in its commentary submitted in connection with the 1992 final rule, the FDA expressly stated that “[ajfter approval of an ANDA, if an ANDA holder believes that new safety information should be added, it should provide adequate supporting information to FDA and FDA will determine whether the labeling for the generic and listed drugs should be revised.” Id. (emphases added). Nothing prevented Perrigo from seeking a prior approval from the FDA for a label change.
Hi. A generic manufacturer can also request that the FDA send “Dear Doctor” warning letters to health care professionals.
In addition to proposing a label change, Perrigo could have suggested that the FDA send a “Dear Doctor” letter to health care professionals, warning them of the risks associated with using ibuprofen concurrently with other drugs known to be hepatotoxic. See 21 C.F.R. § 200.5.
When the FDA first adopted its labeling regulations, well before the Hatch-Wax-man Amendments, it made clear that the labeling requirements “do not prohibit a manufacturer ... from warning health care professionals whenever possibly harmful adverse effects associated with the use of the drug are discovered.” 44 Fed. Reg. 37434, 37447 (June 26, 1979). Although such letters are considered regulated “labeling,” see 21 C.F.R. § 202.1(0(2), Perrigo could have asked the FDA to send them on its behalf. See 21 U.S.C. § 355-l(i)(2)(A) (providing that the FDA will send a letter to health care providers on behalf of an ANDA holder if such letter is a necessary part of a risk evaluation and mitigation strategy).
As Levine reaffirmed, drug manufacturers bear primary responsibility for maintaining their labels consistent with safe and effective use of their products. In the present case, Perrigo could have used at least one of the above three mechanisms to warn consumers and health care professionals of the risks associated with using ibuprofen concurrently with other drugs known to be hepatotoxic. Accordingly, compliance with both the state-law duty to warn and federal law was not impossible.
2. There is no “clear evidence” that the FDA considered and rejected stronger warnings than those proposed by the Gaetas.
Alternatively, to show that compliance was impossible, Perrigo argues the FDA considered and rejected the liver warnings that the Gaetas claim Perrigo should have provided. In
Levine,
the Supreme Court left open the possibility that there could be preemption if a manufacturer was able to demonstrate, by
clear evidence,
that the FDA would not have approved the change to the drug’s label proposed by the plaintiff.
In
Levine,
Wyeth appealed from the jury’s determination that it had failed to provide an adequate warning that directly injecting Phenergan into a patient’s vein creates a significant risk of catastrophic consequences.
The Court noted that in 1988, Wyeth did propose different language for Phenergan’s warning about intra-arterial injection, adapted from revisions the FDA proposed in 1987, but the FDA instructed Wyeth to retain the wording in its existing label. Id. at 1198 n. 5. The FDA apparently “did not regard the proposed warning as substantively different” from the FDA-approved warning. Id. The Court also noted that there was no evidence in the record that either the FDA or Wyeth gave more than “passing attention” to the precise issue in that case — i.e., the difference between the IV-drip and the more dangerous IV-push administration of Phenergan. 8 Id. at 1198-99. Finally, the Court observed that Wyeth did not argue “that it supplied the FDA with an evaluation or analysis concerning the specific dangers posed by the IV-push method.” Id. at 1199. Accordingly, the Court concluded that Wyeth failed to present clear evidence that the FDA would have prevented it from adding a stronger warning about the IV-push method of intravenous administration. Id.
With this in mind, we turn to the evidence presented by Perrigo in this case. In the United States, ibuprofen has been used as a prescription drug for the treatment of osteoarthritis and rheumatoid arthritis since 1974. 67 Fed.Reg. 54139, 54139 (Aug. 21, 2002). The FDA approved the use of 200mg ibuprofen as an OTC drug through the NDA process in 1984, and as a generic drug in 1986. Id. at 54140-41. In 1987, Perrigo obtained approval to market its generic OTC ibuprofen.
In 2002, in response to a citizen petition, the FDA engaged in a detailed review regarding the safety of ibuprofen. 9 Id. at 54141^18. Based on this review, the FDA proposed adding warnings to alert individuals of the potential for renal and gastrointestinal problems associated with ibuprofen. Id. at 54148. In contrast, the FDA found there was limited clinical data available to estimate the prevalence of hepatotoxicity with OTC doses of ibuprofen. Id. at 54145-46. Accordingly, the FDA concluded that there was “no need to propose a hepatitis warning at this time.” Id. at 54146 (emphasis added).
Then, in 2006, the FDA considered what types of warnings should be included for OTC internal analgesic, antipyretic, and antirheumatic drug products, including ibuprofen. See 71 Fed.Reg. 77314 (Dec. 26, 2006). Based on its review, the FDA concluded that additional warnings were necessary regarding: (1) hepatotoxicity associated with acetaminophen, and (2) *1237 gastrointestinal bleeding and renal toxicity associated with aspirin and other nonsteroidal anti-inflammatory drugs. See id. at 77316, 77323-24, 77327-28, 77331-33, 77340. No warnings specific to hepatotoxicity due to ibuprofen use were proposed or considered by the FDA at that time.
The above two FDA reviews do not amount to “clear evidence” that the FDA would not have approved the warnings suggested by the Gaetas. Nowhere does Perrigo point to any evidence that the FDA was presented with and actually considered the risk of hepatotoxicity due to concomitant use of ibuprofen and other drugs known to be hepatotoxic, which is the specific warning requested by the Gaetas in this case.
See Levine,
Nor does Perrigo suggest that it supplied the FDA with any “evaluation or analysis concerning the specific dangers” posed by such concomitant use, and that the FDA refused to act.
See Levine,
Because the evidence presented by Perrigo in this case is no more compelling than the evidence considered and rejected by the Supreme Court in
Levine,
3. There is no obstruction of purpose.
Even if compliance with state and federal law is not “impossible,” state claims may still be preempted if they “ ‘stand[ ] as an obstacle to the accomplishment and execution of the full purposes and objectives of Congress.’ ”
Hillsborough Cnty.,
As to Perrigo’s first argument, there is no indication that when Congress passed the Hatch-Waxman Amendments it intended the goal of delivering low cost generic drugs to supplant the FDCA’s overall goal of providing consumers with safe and effective drugs. As both the Fifth and Eighth Circuits have recognized, the Hatch-Waxman Amendments must be considered as “part and parcel” of the FDCA, and not as a separate statutory framework.
See Demahy,
Indeed, in enlarging the FDA’s powers to protect the public health and to assure the safety and effectiveness of drugs, “Congress took care to preserve state law.”
Levine,
Perrigo’s argument that consumers will lose confidence in generic drugs if they contain warnings different from those of the brand name drugs also fails. First, it is purely speculative that consumers will opt for a more expensive brand name product — or against purchasing any product at all — if the less expensive generic product contains additional warnings. Second, as previously noted, there is no indication Congress intended consumers to have access to low cost drugs at the expense of safety. Finally, by using the “prior approval” process, a generic manufacturer can avoid consumer confusion because, if the FDA accepts the proposed change, that change would be imposed uniformly on both generic and brand name manufacturers. See 57 Fed.Reg. 17950, 17961.
IV
The state law duty to warn by an appropriate label on the generic ibuprofen drug *1239 was not preempted by federal law. Compliance with both state and federal law was not “impossible.” Additional warnings would not stand as an obstacle to the accomplishment of purposes and objectives of Congress. Perrigo failed to present clear evidence that the FDA would have rejected the specific hepatotoxicity warnings proposed by the Gaetas. Accordingly, we REVERSE the district court’s summary judgment in favor of Perrigo on the ground of federal preemption.
REVERSED and REMANDED.
Notes
. The Gaetas have either settled with or dismissed all of the manufacturers except Perrigo-
. For example, generic drugs saved American consumers between approximately $8 billion and $10 billion in 1994. Congressional Budget Office, How Increased Competition from Generic Drugs Has Affected Prices and Returns in the Pharmaceutical Industry 13 (July 1998).
. We note that the issues of causation and whether there was additional evidence indicating the need for hepatotoxicity warnings with the OTC use of ibuprofen are still highly disputed in this case. We leave those issues for the district court to decide in the first instance.
. This version of the regulation was in effect when A.G.'s injury took place. Today, this provision is codified in 21 C.F.R. § 201.80(e).
. Relying on
Morris v. Wyeth, Inc.,
This, however, is a very strained reading of § 314.97. As the Fifth Circuit observed in addressing the same question, had the FDA intended to deny generic manufacturers access to the CBE process despite § 314.97's plain language, we might expect the FDA to say so, either in § 314.97 or § 314.70.
See Demahy,
.
See, e.g., Demahy,
The only post
-Levine
case to consider the issue and reach a different conclusion was the district court's decision in this case.
See Gaeta v. Perrigo Pharm. Co.,
. In reaching its conclusion, the district court in this case relied on an apparent "split of opinion” among
pre-Levine
cases.
See Gaeta,
. Indeed, the
Levine
majority criticized the dissent for "creatively paraphrasing] a few FDA orders” and thereby "conflating warnings about IV-push administration and intraarterial injection to suggest greater agency attention to the question.”
. The citizen petition sought to have ibuprofen included as a generally recognized safe and effective analgesic/antipyretic active ingredient for OTC use. 67 Fed.Reg. 54139, 54140. The petition requested warnings "specific for the OTC use of ibuprofen,” but did not request a specific warning for liver toxicity. See id.
. Perrigo also asserts that the FDA later “required the liver warning plaintiffs seek on prescription-strength ibuprofen but not on OTC ibuprofen,” which it argues implies that the FDA was aware of potential risks but made a calculated decision to include the warning only on prescription drugs. Perrigo, however, fails to provide any support for this assertion. In any event, as the Gaetas argue, the conclusion to be drawn from this is quite the opposite: the fact that the FDA later required these liver warnings on prescription-strength ibuprofen suggests that the FDA might also have accepted similar warnings for the OTC ibuprofen had Perrigo or any other manufacturer suggested such warnings.
. As the Supreme Court observed, had Congress considered state-law suits to be an obstacle to its objectives, "it surely would have enacted an express pre-emption provision at some point during the FDCA’s 70-year history.”
Levine,
