Amarin v. Hikma: Federal Circuit reverses Inducement Dismissal in Skinny-Label Case

by Dennis Crouch

Amarin Pharma, Inc. v. Hikma Pharmaceuticals USA Inc., No. 2023-1169 (Fed. Cir. June 25, 2024).

This is another “skinny label” generic pharmaceutical patent case.  The basic setup involves a drug that has several different approved uses; with the branded manufacturer holding patents covering only some of the uses.  The generic company is then permitted to sell the drug, but is labelled only for non-patented uses. These labels are known as  carve-out or “skinny” labels under 21 U.S.C. § 355(j)(2)(A)(viii).

It is inevitable that people will purchase and use the generic drugs for the patented uses, and that the generic distributer will be accused accused of inducing  those infringing acts.  Although the generic typically makes a profit on these sales, it those profits pale in comparison to the profits lost by the branded company.

Amarin v. Hickma highlights some of the challenges that generics are facing when marketing drugs with these carved-out labels.  One difficulty is that the FDA severely limits what the generic can say about the drug and its uses, and the carve-out is generally based upon statements made by the patentee.  Here, the court follows a label-plus approach. The skinny label itself will not be enough to show inducement, but that evidence can be combined with other evidence (such as marketing) to prove liability.

The Patents at Issue. The asserted patents, U.S. Patent Nos. 9,700,537 and 10,568,861, are directed to methods of using icosapent ethyl to reduce the risk of cardiovascular events. Icosapent ethyl is the active ingredient in Amarin’s Vascepa drug, originally approved by the FDA in 2012 to treat severe hypertriglyceridemia (the “SH indication”).  The patents covering that treatment are no longer in force. In 2019, Amarin obtained FDA approval to market Vascepa for reducing cardiovascular risk (the “CV indication”) and listed the asserted patents in the Orange Book. As the court noted, the CV indication is commercially significant, accounting for over 75% of Vascepa’s $1.1 billion in 2020 sales.  Hikma’s skinny label generic was approved by the FDA — omitting the CV indication.  That said, the exact same dosage used for SH will also treat CV.

Although not quite a Trojan Horse, the case brings that old story to mind. The generic drug with its ‘skinny label’ appears benign – approved only for the less financially lucrative non-patented uses, but with the latent potential ready to emerge.

The key issue before the Federal Circuit was whether Amarin’s complaint plausibly alleged that Hikma actively induced infringement under 35 U.S.C. § 271(b), despite Hikma’s skinny label generic omitting the patented CV indication. Reversing the district court’s dismissal, the Federal Circuit held that the totality of Amarin’s allegations—based on Hikma’s label, press releases, and website—plausibly pleaded induced infringement at the motion to dismiss stage.

The court explained that while Hikma’s label standing alone likely did not encourage infringement, other aspects of the label combined with Hikma’s public statements could support an inducement claim. For example, the label allegedly described clinical studies involving patients with cardiovascular risk factors covered by the asserted patents, which could be interpreted as a teaching to prescribe the drug for the patented use.  In addition, Hikma’s original generic label included a limitation of use – saying that the drug was not approved for the CV indicated.  However, once Amarin received FDA approval, Hikma removed the limitation of use. In its decision, the court explained that arguably could communicate to physicians that the drug is appropriate for the patented use.

Importantly, the court emphasized that Amarin’s inducement theory relied not just on Hikma’s label, but also its press releases and marketing materials. Hikma’s pre-launch press releases referred to its product as the “generic equivalent to Vascepa” and a “generic version of Vascepa” without stating it was AB-rated only for the SH indication. The releases also touted Vascepa’s sales figures, which were largely attributable to the CV indication. Hikma’s website advertised the drug in the broad category of “Hypertriglyceridemia.” Drawing all reasonable inferences in Amarin’s favor at the motion to dismiss stage, the appellate panel found it plausible that Hikma’s statements could encourage physicians to prescribe its drug for the patented CV uses.

The Federal Circuit distinguished Takeda Pharms. U.S.A., Inc. v. West-Ward Pharm. Corp., 785 F.3d 625 (Fed. Cir. 2015), noting that this case involved not just a skinny label, but also Hikma’s public statements as a basis for inducement.  And, citing GlaxoSmithKline LLC v. Teva Pharms. USA, Inc., 7 F.4th 1320 (Fed. Cir. 2021), the court reiterated that the content of a label and marketing materials presents a factual dispute not suitable for resolution on a motion to dismiss.

Although incremental, Amarin v. Hikma adds to the risk that generic manufacturers face when using a skinny label — particularly when their marketing approach is not tightly controlled; and any GC will admit that their sales and marketing teams are some of the most difficult to control.


62 thoughts on “Amarin v. Hikma: Federal Circuit reverses Inducement Dismissal in Skinny-Label Case

  1. 4

    “Hikma’s original generic label included a limitation of use – saying that the drug was not approved for the CV indicated. However, once Amarin received FDA approval, Hikma removed the limitation of use. In its decision, the court explained that arguably could communicate to physicians that the drug is appropriate for the patented use.”

    That was certainly the hook that should preclude a grant of a 12(b)(6). As the court said, the magistrate was correct to recommend denial.

    This case also raises a very interesting “law school” question regarding injunctive relief. Typically, the facts for many if not all cases dealing with injunctive relief address the two major prongs of a preliminary injunction, i.e., likelihood of success and irreparable harm. In most of such cases, the facts and issues around likelihood of success is relatively close, lets say 40:60 (or less than 50:50) for success. In these cases, the facts/issue of irrepable harm may often tip the scale enough such that the injunctive relief is granted in spite of the likely loss on the merits.

    Here, we have an interesting test case. Lets say the likelihood of success on the merits that Amarin can prove inducement is 20:80 or 20%. That’s perhaps reasonable, maybe for the change in the label above it may be higher, but that’s not the point here. This is a case in which the irrepable harm prong controls. Given the sale numbers provided above, the damages of lost profits to Amarin would likely be 6 billion or more, 1.3 billion (2021), 1.6 billion (2022), 2.0 billion (2023), 2,4 billion (2024). If Hikema was found to induce infringement could they pay a 6 billion judgement? I think not. Could they possibly finance the judgement. I doubt it with a little factory/warehouse in India and making minimum annual profits with its generics.

    A motion for premlimiary injuction would be an interesting play! Would Judge Andrews require that Hikeme put up some form of a 5 billion bond?

  2. 3

    No one seems much interested in discussing this CAFC decision, but as long as we are discussing pharmaceuticals…

    There is no known drug that they can give a person with dementia to restore them temporarily to lucidity. If Pres. Biden appears disoriented tomorrow evening, that is a good reason to conclude that he is senile. If he does not appear disoriented, however, then you cannot rescue the Biden-dementia hypothesis by invoking drugs. You really do have to retire the hypothesis at that point.

    1. 3.1

      The lady doth protest too much, methinks.

      (and seeks to ignore the senses — but here’s an easy way to validate: submit to drug testing)

    2. 3.2

      In all honesty, the Biden-dementia hypothesis is looking quite plausible this evening.

      1. 3.2.1

        Greg, you really need to step away from the OMB-TDS koolaid crowd.

  3. 2

    > press releases and marketing materials

    Quite an unforced error /sigh

  4. 1

    Just more unreality piled on magical thinking.

    Doctors know what drugs do, and they don’t need labels or pharma reps to tell them.

    Meanwhile, the old science fiction as prior art popped into my Twitter feed

    link to

    1. 1.1

      Science fiction as prior art? Ha!!! Can’t happen. Snowflake can set you straight.

      1. 1.1.1

        Never said “can’t.”

        Said shouldn’t. (Please tell me that you are aware that judges make mistakes)

        And it is quite clear why.

        Any factual item that may be in a work of science fiction (you know, a non-fiction item), has a better evidentiary source than a work of fiction.


          Never said that? Sorry, cheap AI, we have human being witnesses. We can almost smell your cheap AI flop sweat. Please add more to your sci fi debacle.

          or just fall back on one of your cheap AI tropes.

          Your choice!


          link to


            You are not paying attention.



                lol – your link is so you (not found)!

                1. Hey, you are the one doing it wrong.

                  I have told you how to post without depending on links, but that apparently is beyond your abilities.

                  Say: “La vee”

                2. Snowflake was not in our meeting where we decided to break his links. As you know, cheap AI was not invited.

                3. Everybody knows it’s still Snowflake’s attempts to change the subject from his latest i.e “sci fi” debacle. But at least he finally beat Medicare.

                4. It’s sad when cheap AI is not yet ready to come out its parents’s basement.

                  What is this “sci fi” debacle?

                5. Your typical antics avail you not: projections, talking with yourself and getting things wrong — as is typical for you.

                  Have you ever considered engaging on the merits?

                6. Leave Snowflake alone. He’s still working on coming up with that imaginary registration number. And still licking his wounds from his latest [i.e. the “sci fi”] debacle.

                7. Nice triple payout from your €hoi€e$ of talking to yourself, false assertion/attempt at outing (when you haven’t given the non-outing confirmation of your prior role at the USPTO), and projecting.


                8. Hey!! Where’s my mindless ad hominem Snowflake?? You missed one!! What will happen with your quarterly review?

                9. From someone who has waited more than a month on a totally unrelated comment to try to sneak a “last” comment (and never a last and best), your waiting all of four minutes to accuse “missed one” is a non-starter.

                10. four minutes?

                  Snowflake whether you are cheap AI or what we know you are you can get a better job than counting minutes.

                11. Come to America, Snowflake. Can you say “would you like fries with that” in English?

                12. Nothing you have said persuades us you are not really cheap Chinese AI that is an incredibly sloppy reader, writer, and thinker Snowflake.


            exactly what cheap AI would regurgitate, Snowflake.

            convince us you are more than cheap AI. but bear in “mind” that human beings have concluded that you are an incredibly sloppy reader , writer, thinker, and pretender to be a human being.


            link to


              Who is “us?”
              Why in world would there need be any aspect of convincing you anything, given your track record of 0bsess10n?


              By the way, you are “Not Found


                you are doing nothing to show you are not cheap AI, Snowflake.

                quite the opposite

                1. The thing is, your false assertions was a tactic prior to your presentation AI cover.

                  It just comes across like you are mindlessly jumping on a bandwagon.

                  It has little to no value.

                  Maybe try engaging on a substantive point.

                  For a first time.

                2. Ok cheap Chinese AI here is a substantive question.

                  What is the imaginary registration number cheap Chinese AI made up?

                3. And is cheap Chinese AI embarrassed by its latest (i.e., what is now known as the “sci fi”) debacle?

                4. Same old (new?) script – but the effect remains: you and your choices make no sense (but make me €oin).

                5. Are you saying, Snowflake, you are paid so little as cheap Chinese AI you cannot produce sone random number and say that is your imaginary registration number?

                6. Why in the world would I take that path and why in the world would you offer it?

                  What was your position at the Office prior to your retirement that such would even enter your mind? Clearly, you have never been an attorney.


                You are unable to pass the Turing test, Snowflake.

                Why is that?

                1. Are you even aware of what the Turing test is?

                  Given how far below me you are, what does your accusation say about you?

                2. Do you really need me to expound on that point?

                  If so, you are lower even than I had given you credit for.

                3. You are the proudest sad cheap Chinese AI we have ever heard of!! Walk tall, Cheap Chinese AI!!

                4. And you my friend with the shifty historical pseudonyms, are the lowest one who imagines themselves to be taller than their target.

                  With Malcolm on these boards, that is saying a lot.

    2. 1.2

      “Doctors know what drugs do, and they don’t need labels or pharma reps to tell them.”

      The above should be a true, unqualified statement. I have met many a Doctor, however, who has no idea what drugs do. But is not the issue. The factual issues in this case are about Hikima’s actions and whether Hikima acted in a way to induce infringement.

      Hope that helps…

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