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Once the Food and Drug Administration (FDA) has approved a new drug, federal law authorizes other manufacturers to seek approval for marketing generic versions so long as they do not infringe on any patented uses. All 50 states and the District of Columbia permit (or require) medical providers to substitute the brand-name drug with the cheaper generic version. Still, generic manufacturers may be subject to liability under federal law if they actively induce infringement of the brand manufacturer's patent. See 35 U. S. C. §271(b).
Amarin Pharma, Inc. developed Vascepa, a drug containing the active ingredient icosapent ethyl. In 2012, the FDA approved Vascepa for the treatment of severe hypertriglyceridemia (the "SH indication"). In 2019, the FDA approved Vascepa for a second, more common use: reducing cardiovascular risk in hypertriglyceridemia patients who already take statins (the "CV indication"). Amarin obtained two method-of-use patents for this indication.
Hikma Pharmaceuticals USA Inc., a generic drug manufacturer, submitted an abbreviated new drug application for generic icosapent ethyl in 2016. It initially filed a paragraph IV certification, see 21 U. S. C. §355(j)(2)(A)(vii)(IV), asserting that Amarin's SH-indication patents were invalid. After a district court invalidated Amarin's SH-indication patents, Hikma supplemented its application with a section viii statement, see §355(j)(2)(A)(viii), seeking approval of a skinny label that included only the SH indication and carved out Vascepa's still-patented CV-indication method of use. In 2020, the FDA approved Hikma's application with the skinny label and assigned an "AB" rating indicating therapeutic equivalence to Vascepa when used according to its labeling.
Amarin filed suit in the District of Delaware, alleging that Hikma actively induced others to infringe Amarin's CV-indication patents based on the totality of Hikma's statements across the skinny label, the patient information leaflet, Hikma's website, and its press releases. The District Court granted Hikma's motion to dismiss for failure to state a claim, explaining that none of these statements constituted active steps to encourage infringement. The Federal Circuit reversed, finding it at least plausible that a physician could read the relevant statements as an instruction or encouragement to infringe.
Held: Amarin has failed to state a claim for active inducement in violation of §271(b), so its complaint cannot withstand Hikma's motion to dismiss. The central question is whether Amarin plausibly alleged that Hikma actively encouraged infringing use, not merely whether doctors could plausibly read the alleged statements as instructions to infringe. Pp. 7-14.
(a) A claim for active inducement of infringement under §271(b) requires three elements: direct infringement by a third party, Limelight Networks, Inc. v. Akamai Technologies, Inc.,
(b) This case concerns the third element--"active steps." Active steps involve "purposeful, culpable expression and conduct," Grokster,
(c) Given these standards, Amarin misses the mark in arguing that it need not do more than "allege . . . a plausible chain of events through which statements made by [Hikma] could lead a healthcare provider . . . to prescribe or dispense Hikma's drug to reduce a patient's cardiovascular risk." Brief for Respondents 21 (alterations and internal quotation marks omitted). Allegations of "active steps" cannot be based only on "vague" language "combined with speculation about how [others] may act." Takeda Pharmaceuticals U. S. A., Inc. v. West-Ward Pharmaceutical Corp., 785 F. 3d 625, 632. Pp. 8-10.
(d) Applying these standards, Amarin fails to allege "more than a sheer possibility" that Hikma actively induced infringement. Ashcroft v. Iqbal,
(1) Several of Hikma's statements have an "obvious alternative explanation": compliance with the law or standard industry practice. Bell Atlantic Corp. v. Twombly,
(2) Because the court looks for affirmative statements or actions to induce liability, Amarin may not rely on "mere omissions, inactions, or nonfeasance"--such as the skinny label's omission of the CV Limitation of Use or the press releases' failure to "mentio[n ] that [Hikma's] approved use was limited to the far-lesser-known SH indication," Brief for Respondents 23, 26--to plausibly allege active inducement, Twitter, Inc. v. Taamneh,
(3) Hikma's remaining statements are too vague to support inducement liability. The patient information leaflet's warning about side effects for people with cardiovascular disease and its disclaimer that medicines are sometimes prescribed for other purposes are implausibly roundabout ways to induce medical providers to infringe. The website's description of the therapeutic category as "hypertriglyceridemia" and the indication that the drug is "AB" rated do not plausibly constitute statements designed "to stimulate others to commit" infringement, Grokster,
104 F. 4th 1370, reversed and remanded.
Jackson, J., delivered the opinion for a unanimous Court.
Opinion of the Court
608 U. S. ____ (2026)
NOTICE: This opinion is subject to formal revision before publication in the United States Reports. Readers are requested to notify the Reporter of Decisions, Supreme Court of the United States, Washington, D. C. 20543, pio@supremecourt.gov, of any typographical or other formal errors.
No. 24-889
HIKMA PHARMACEUTICALS USA INC., et al., PETITIONERS v. AMARIN PHARMA,
INC., et al.
on writ of certiorari to the united states court of appeals for the federal circuit
[June 4, 2026]
Justice Jackson delivered the opinion of the Court.
Federal law allows pharmaceutical manufacturers to market generic versions of brand-name drugs, so long as they obtain approval from the Food and Drug Administration (FDA) and do not infringe on any patented uses. Because a generic drug is, by definition, "biologically equivalent to . . . the brand-name drug," Caraco Pharmaceutical Laboratories, Ltd. v. Novo Nordisk A/S,
Respondent Amarin Pharma, Inc., the manufacturer of brand-name icosapent ethyl, brought an induced-infringement claim against petitioner Hikma Pharmaceuticals USA Inc., a manufacturer of generic icosapent ethyl. Amarin relied on a combination of Hikma's statements across its skinny label (an abbreviated label used for generic drugs), its website, and its press releases to allege that Hikma took "active steps" to induce infringement of Amarin's patented uses. After the District Court dismissed the complaint for failure to state a claim, the Court of Appeals for the Federal Circuit reversed, finding it "at least plausible that a physician could read" the relevant statements "as an instruction or encouragement to" infringe. 104 F. 4th 1370, 1380 (2024).
That was error. The central question is whether Amarin plausibly alleged that Hikma actively encouraged infringing uses, not merely whether doctors could plausibly read the alleged statements as instructions to infringe. We therefore reverse the judgment of the Federal Circuit and remand the case for further proceedings.
I
A
The FDA must approve new and generic drugs before they go to market. See Caraco,
Once the FDA has approved a new drug, federal law authorizes other manufacturers to seek approval for marketing generic versions. In particular, the Hatch-Waxman Amendments "allow a generic competitor to file an abbreviated new drug application (ANDA) piggy-backing on the brand's NDA." Id., at 404-405 (citing §§355(j)(2)(A)(ii), (iv) (2012 ed.)). "[T]he typical ANDA shows that the generic drug has the same active ingredients as, and is biologically equivalent to, the brand-name drug." Id., at 405. The generic manufacturer can thereby "avoid the costly and time-consuming studies required for a pioneer drug." Eli Lilly & Co. v. Medtronic, Inc.,
But the FDA cannot authorize a generic drug that would infringe a patent. So, while the FDA does not control the approval of drug patents, it keeps track of them in a volume called Approved Drug Products With Therapeutic Equivalence Evaluations, or more memorably, the Orange Book. A manufacturer seeking to market a generic version of a drug that appears in the Orange Book has two options. The first is to file a "paragraph IV certification," which states that a patent "is invalid or will not be infringed by the manufacture, use, or sale of the [generic] drug." §355(j)(2)(A)(vii)(IV). Such filing is an act of infringement under patent law, and it gives the brand-name manufacturer the right to file a lawsuit against the generic manufacturer to determine the validity and scope of the patent. Caraco,
The second option is to submit a "section viii statement," and assert "that the generic manufacturer will market the drug for one or more methods of use not covered by the brand's patents." Id., at 406; see 21 U. S. C. §355(j)(2)(A)(viii). This less confrontational path may be available if, for example, "the brand's patent on the drug compound has expired and the brand holds patents on only some approved methods of using the drug." Caraco,
These provisions do not foreclose the possibility that an approved ANDA may still interfere with a patented method of use. Because a generic drug is, by definition, "biologically equivalent to . . . the brand-name drug," Caraco,
Given that all 50 States and the District of Columbia have such laws, see Brief for United States as Amicus Curiae 7-8 (collecting statutes), generic manufacturers surely know (and perhaps even expect) that their products will be put to infringing use. But "mere knowledge of infringing potential or of actual infringing uses [is] not . . . enough . . . to subject a distributor to liability." Metro-Goldwyn-Mayer Studios Inc. v. Grokster, Ltd.,
A trio of our patent cases illuminates the required elements of an induced-infringement claim. First, there must be direct infringement by a third party. Limelight Networks, Inc. v. Akamai Technologies, Inc.,
B
Amarin developed a drug called Vascepa, which contains the active ingredient icosapent ethyl. See 104 F. 4th, at 1372. "In 2012, the [FDA] approved Vascepa for the treatment of severe hypertriglyceridemia ('the SH indication')," a condition characterized by very high blood triglyceride levels. Ibid. Vascepa's label disclosed that its effect "on cardiovascular mortality and morbidity in patients with severe hypertriglyceridemia has not been determined" (the "CV Limitation of Use") because Vascepa was not yet approved for other uses. Ibid. (internal quotation marks omitted). In the meantime, Amarin continued its research into Vascepa's potential cardiovascular uses.
Hikma is a generic drug manufacturer. In 2016, Hikma submitted an ANDA for approval of its generic icosapent ethyl. Hikma opted to file a paragraph IV certification, asserting that Amarin's method-of-use patents for the SH indication was invalid. Ibid., n. 4. Amarin sued Hikma, and a district court invalidated Amarin's SH-indication method-of-use patents. Ibid.
But that decision did not spell doom for Amarin. In 2019, before the invalidation of Amarin's SH-indication patents, and while Hikma's ANDA remained pending, the FDA approved Vascepa for a second, much more common use: as a treatment to reduce cardiovascular risk in hypertriglyceridemia patients who already take statins (the "CV indication"). Id., at 1372. Amarin removed the CV Limitation of Use from Vascepa's label and obtained two method-of-use patents for the CV indication. Ibid.
Hikma responded to these new developments by supplementing its pending ANDA with a section viii statement. Hikma now sought approval of a skinny label that included only the SH indication (no longer protected by a method-of-use patent). Id., at 1373. To ensure that its labeling otherwise mirrored Vascepa's, see 21 U. S. C. §355(j)(2)(A)(v) (requiring generic labeling to be the "same" as the brand-name labeling with a few exceptions), Hikma also removed the CV Limitation of Use from its proposed label. In 2020, the FDA approved Hikma's ANDA with the skinny label, and assigned Hikma's generic drug an "AB" rating, indicating that it is therapeutically equivalent to Vascepa when used according to its labeling. 104 F. 4th, at 1373-1374.
Soon after Hikma began marketing its generic drug, Amarin filed suit in the District of Delaware, alleging that Hikma had actively induced others to infringe Amarin's patent for the CV-indication method of use. Amarin alleged that the totality of Hikma's statements across several documents encouraged infringing uses. 578 F. Supp. 3d 642, 645-647 (2022). First, the label omitted the CV Limitation of Use and retained information about a clinical study in which some of the patients were taking statins.2 Second, the patient information leaflet that accompanied the label warned against possible side effects for "people who have heart (cardiovascular) disease"--the target population for Vascepa's patented CV-indication method of use--and noted that "[m]edicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet." 2 App. 124-125. Third, Hikma's website described its generic drug as "AB" rated, and listed the drug's therapeutic category as "[h]ypertriglyceridemia," a category that includes but is broader than SH. Id., at 195. Finally, prior to the launch of its generic drug, Hikma issued a series of press releases describing the product as " 'generic Vascepa' without mentioning that th[e] approved use was limited to the far-lesser-known SH indication," and touting Vascepa's U. S. sales figures attributable to both the SH and CV indications. Brief for Respondents 23-24. In response to Amarin's complaint, Hikma filed a motion to dismiss under Federal Rule of Civil Procedure 12(b)(6), for failure to state a claim for induced infringement.
The District Court granted Hikma's motion to dismiss, explaining that none of Hikma's statements constituted active steps to encourage infringing Amarin's method-of-use patents for the CV indication. 578 F. Supp. 3d, at 645-648. The Federal Circuit reversed. It held (as all agree here) that Hikma's label, standing alone, does not induce infringement. See 104 F. 4th, at 1379; Brief for Respondents 40-41. But the court found it "at least plausible that a physician could read" the label, website, and press releases "as an instruction or encouragement to prescribe [Hikma's generic] for any of the approved uses of icosapent ethyl." 104 F. 4th, at 1378-1380 (emphasis deleted).
We granted certiorari,
II
Our well-established federal pleading standards are not up for debate in this case. In order to proceed to discovery, a plaintiff must "state a claim to relief that is plausible on its face." Bell Atlantic Corp. v. Twombly,
This case requires us to apply these familiar pleading standards to the third element of an induced-infringement claim: that the inducer took "active steps . . . to encourage direct infringement." Grokster,
Given these standards, Amarin misses the mark in arguing that it need not do more than "allege . . . a plausible chain of events through which statements made by [Hikma] could lead a healthcare provider . . . to prescribe or dispense Hikma's drug to reduce a patient's cardiovascular risk." Brief for Respondents 21 (alterations and internal quotation marks omitted).4 Amarin relies primarily on two cases to press its point. First, it points to our holding in National Rifle Association of America v. Vullo,
Amarin's second (and more germane) case is Grokster, where we described "[t]he classic instance of inducement" as an "advertisement or solicitation that broadcasts a message designed to stimulate others to commit violations."
All in all, inducement cannot be based only on "vague" language "combined with speculation about how [others] may act." Takeda Pharmaceuticals U. S. A., Inc. v. West-Ward Pharmaceutical Corp., 785 F. 3d 625, 632 (CA Fed. 2015); see also Grokster,
III
Applying these standards to the complaint here, Amarin fails to allege "more than a sheer possibility" that Hikma actively induced infringement of Amarin's CV-indication patents. Iqbal,
First, several of the relevant statements have an "obvious alternative explanation," Twombly,
Amarin also finds fault in Hikma's statements describing its product as " 'generic Vascepa' " or the " 'generic equivalent' of Vascepa" in the prelaunch press releases. Brief for Respondents 23-24. But as we have explained, it is "normal industry practice" to "truthfully describe" a generic drug as " 'equivalent' " to the brand-name comparator. See Inwood Laboratories,
Second, Amarin may not rely on "mere omissions, inactions, or nonfeasance" to allege active inducement. Twitter, Inc. v. Taamneh,
Third, Amarin comes up short in resting the remainder of its inducement claim on "vague" statements "combined with speculation about how [medical providers] may act" in response to those statements. Takeda, 785 F. 3d, at 632. Take, to start, Amarin's argument that medical providers "would plausibly understand" the label's patient information leaflet to encourage infringing uses because it identifies potential side effects for people with cardiovascular diseases and notes that medication is sometimes prescribed for uses other than those specifically indicated. Brief for Respondents 31 (internal quotation marks omitted). Again, §271(b) requires "activ[e ]," not passive, inducement. So the question is not merely whether the statements could be "plausibly underst[oo]d" to induce infringement, but whether they plausibly constitute "affirmative steps to bring about the desired result" of infringement. Global-Tech.,
Amarin is wrong to rely on the statements on Hikma's website for the same reason. The website describes the therapeutic category for its drug as "hypertriglyceridemia," and indicates that the drug is "AB" rated. It is not plausible that Hikma "designed" these statements "to stimulate others to commit" infringement. Grokster,
Finally, the sales figures in Hikma's press releases are the vaguest of "vague" statements alleged in Amarin's complaint. Takeda, 785 F. 3d, at 632. Amarin argues that, by including the sales figures attributable to both the SH-indication and the CV-indication methods of use, Hikma encouraged using its generic for the patented CV indication. But there are myriad steps between those statements and induced infringement that Amarin fails to mention. For Amarin's speculation to bear out, a medical provider would have to look up and read the press releases, which were directed to investors rather than doctors and pharmacists; have enough background knowledge of pharmaceutical sales to understand the quoted sales figures to be attributable to both the SH-indication and the CV-indication methods of use; and draw from this fact a subtle encouragement to start prescribing Hikma's generic to hypertriglyceridemia patients who already take statins. Perhaps this chain of events is "possib[le]" (anything is possible). Iqbal,
* * *
For the reasons we've explained, Amarin has failed to state a claim for active inducement in violation of §271(b), so its complaint cannot withstand Hikma's Rule 12(b)(6) motion. We therefore reverse the judgment of the Federal Circuit and remand the case for further proceedings consistent with this opinion.
It is so ordered.
Recall that the CV-indication method of use that Amarin successfully patented was the concurrent taking of Vascepa with statins. See supra, at 5.
Hikma does not dispute before us that Amarin plausibly pleaded the other two elements of induced infringement: direct infringement and specific intent. See 104 F. 4th 1320, 1378 (CA Fed. 2024).
To Amarin's credit, this argument reflects the recent approach of the Federal Circuit, which has increasingly trained its focus on whether the relevant statements could be read by medical providers as instructions to infringe. See, e.g., GlaxoSmithKline LLC v. Teva Pharmaceuticals USA, Inc., 7 F. 4th 1320, 1336-1337 (2021). The decision below appears to follow this trend line. See 104 F. 4th, at 1378-1380 (resting reversal on the conclusion that it is "at least plausible that a physician could read" the relevant statements "as an instruction or encouragement" to infringe). We reject that trend today, and hereby emphasize that the key question is whether a defendant actively encouraged infringement through its statements, not merely how others may understand those statements.
Even if Hikma could have deviated from what Amarin had put on its label, Hikma's skinny label does not come close to inducing infringement. Amarin does not dispute that the clinical study on the label was for patients suffering from SH--the off-patent method of use for which Hikma was approved. And Hikma's omission of the CV Limitation of Use cannot support Amarin's case for active inducement of infringement, as we discuss below.
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No. 24-889
Argued: April 29, 2026
Decided: June 04, 2026
Court: United States Supreme Court
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