Court Rules in Favor of Amarin Corp. in "Off-label" Dispute

Amarin Corporation plc (NASDAQ: AMRN) today announced a United States District Court has ruled that Amarin may promote to healthcare professionals certain uses of Amarin'slead product, Vascepa^®(icosapent ethyl) capsules, that are not covered by current FDA-approved labeling for the drug so long as the promotion is truthful and non-misleading. The Court declaration covers promotion of the FDA-reviewed and agreed effects of Vascepa demonstrated in the ANCHOR clinical trial of patients with persistently high triglycerides after statin therapy and use of peer-reviewed scientific publications that present the current state of scientific research related to the potential of Vascepa to reduce the risk of cardiovascular disease. Based on today's ruling Amarin plans to begin promotional activities consistent with the opinion as soon as possible.

Decision is a victory aimed at improved patient care

The decision opens more direct and effective paths to communicate truthful and non-misleading information about Vascepa clinical trial results and the state of science relevant to the potential of Vascepa to reduce the risk of cardiovascular disease. With accurate information readily available, healthcare professionals will be better able to assess for themselves how best to choose among available treatment options for their patients. With healthcare professionals better informed, this decision is a victory thatAmarin believes will lead to improved patient care.

Cardiovascular disease is the leading cause of death for men and women in the United States. Significant risk from cardiovascular disease remains for tens of millions of Americans after statin therapy and recommended changes in diet and exercise. Given the significant need to reduce the risk of cardiovascular disease, numerous independent national and international treatment guidelines and position statements recommend drug therapy as an adjunct to healthy diet, lifestyle change and statin therapy for at-risk patients with persistently high triglyceride levels in their blood to lower those patients' triglycerides and/or non-high-density lipoprotein cholesterol. The use of Vascepa in this patient population, as studied in the ANCHOR trial, is contemplated by guidelines, is medically accepted and commonly prescribed by physicians. This is the practical reality despite the fact that FDA did not approve Vascepa for this use and even though a link between such treatment and reduced cardiovascular risk has not been determined. Use of Vascepa within these guidelines is also listed on independent drug compendia on which reimbursement from Medicare, Medicaid and private payor plans is based. Amarin's REDUCE-IT cardiovascular outcomes study of Vascepa, which is designed to evaluate the efficacy of Vascepa in reducing cardiovascular mortality and morbidity in a high-risk patient population on statin therapy, is over 95% enrolled.

"This lawsuit is based on the principle that better informed physicians will make better treatment decisions for their patients," saidJohn F. Thero, President and Chief Executive Officer. "Many physicians are aware of the efficacy data included in FDA-approved labeling for Vascepa but are not aware of efficacy data from the ANCHOR study of Vascepa. FDA has already included the safety data from both the MARINE and ANCHOR studies in approved Vascepa labeling. Amarin will now be able to communicate efficacy data from ANCHOR and other relevant study results to these physicians and to others in the medical community in the context of appropriate disclaimers."

The truthful and non-misleading information about Vascepa protected by the Court order

The Court determined that Amarin may engage in truthful and non-misleading speech promoting the off-label use of Vascepa, i.e., to treat patients with persistently high triglycerides, and specifically make to healthcare professionals the following truthful and non-misleading statements:

• Supportive but not conclusive research shows that consumption of EPA and DHA omega-3 fatty acids may reduce the risk of coronary heart disease. Vascepa should not be taken in place of a healthy diet and lifestyle or statin therapy.
• Vascepa is not FDA-approved for the treatment of statin-treated patients with mixed dyslipidemia and high (≥ 200 mg/dL and < 500 mg/dL) triglyceride levels due to current uncertainty regarding the benefit, if any, of drug-induced changes in lipid/lipoprotein parameters beyond statin-lowered low-density lipoprotein cholesterol on cardiovascular risk among statin-treated patients with residually high triglycerides. No prospective study has been conducted to test and support what, if any, benefit exists.
• Recent cardiovascular outcomes trials (ACCORD-Lipid, AIM-HIGH, and HPS2-THRIVE), while not designed to test the effect of lowering triglyceride levels in patients with high triglyceride levels after statin therapy, each failed to demonstrate incremental cardiovascular benefit of adding a second lipid-altering drug (fenofibrate or formulations of niacin), despite raising high-density lipoprotein cholesterol and reducing triglyceride levels, among statin-treated patients with well-controlled low-density lipoprotein cholesterol.
• The ANCHOR trial demonstrates that Vascepa lowers triglyceride levels in patients with high (≥ 200 mg/dL and < 500 mg/dL) triglyceride levels not controlled by diet and statin therapy.
• In the ANCHOR trial, Vascepa 4g/day significantly reduced TG [triglycerides], non- HDL-C [non-high-density lipoprotein cholesterol or non-"good cholesterol,"] Apo B [Apolipoprotein B], VLDL-C [very-low-density lipoprotein cholesterol], TC [total cholesterol] and HDL-C [high-density lipoprotein cholesterol or "good cholesterol"] levels from baseline relative to placebo in patients with high (≥ 200 mg/dL and < 500 mg/dL) triglyceride levels not controlled by diet and statin therapy. The reduction in TG [triglycerides] observed with Vascepa was not associated with elevations in LDL-C [low-density lipoprotein cholesterol or "bad cholesterol] relative to placebo.

The Court's ruling also permits communication to healthcare professionals of the following information:

• peer-reviewed scientific publications relevant to the potential effect of EPA on the reduction of the risk of coronary heart disease, such as the JELIS cardiovascular outcomes trial of a pure-EPA product in Japanese patients and other publications on omega-3 acid studies; and
• more complete efficacy data from the ANCHOR trial.

To ensure that this speech is non-misleading, Amarin would also disclose the following:

• FDA has not approved to Vascepa reduce the risk of coronary heart disease;
• The effect of Vascepa on the risk of cardiovascular mortality and morbidity has not been determined;
• A cardiovascular outcomes study of Vascepa designed to evaluate the efficacy of Vascepa in reducing cardiovascular mortality and morbidity in a high-risk patient population on statin therapy is currently underway;
• Vascepa may not be eligible for reimbursement under government healthcare programs, such as Medicare or Medicaid, for treatment of statin-treated patients with mixed dyslipidemia and high (≥ 200 mg/dL and < 500 mg/dL) triglyceride levels or to reduce the risk of coronary heart disease. We encourage you to check that for yourself; and
• Any potential financial or affiliation biases between the firm and those who conducted the ANCHOR study.

About prohibitions on communication of off-label drug information

Once a drug is approved by FDA for a specific use in a specific patient population, physicians may exercise their medical judgment to prescribe the drug for any use in any patient population. It is estimated that approximately 20% of all prescriptions inthe United States are used by physicians for such "off-label" indications. FDA has taken the position, however, that federal law prohibits pharmaceutical companies from proactively promoting data to the medical community regarding off-label uses -- even when such information is accurate, not misleading and reflective of accepted medical treatment.

FDA has acknowledged the importance of the off-label use of many pharmaceutical products. Federal, state and private health plans routinely pay for many off-label drug uses, including certain off-label uses of Vascepa. FDA permits limited communications on off-label uses, such as in response to unsolicited requests for information, under FDA's publication reprint guidance and in connection with scientific exchanges. Prior to this judgment, these restrictions significantly limited the flow of information about the specified off-label uses of Vascepa.

About the ruling and potential future proceedings

The ruling today by the Honorable Judge Paul Engelmayer of the United States District Court for the Southern District of New York granted Amarin and the physician plaintiffs relief in the form of a declaratory judgment. The ruling declared as unconstitutional, in this case with the specified disclosures, FDA off-label promotion restrictions.

An appeal of the Court's ruling can be filed within 60 days. The ruling will remain in effect until the Court makes a final decision in the case unless the ruling is appealed and overturned. The underlying litigation may proceed until the Court enters a final order in the case. The lawsuit did not seek and the ruling did not grant approval of the indication contemplated by the ANCHOR study.

About the REDUCE-IT cardiovascular outcomes study

The REDUCE-IT cardiovascular outcomes study is the first prospective double-blinded cardiovascular outcomes study of any drug in a population of patients who, despite stable statin therapy, have elevated triglyceride levels. The REDUCE-IT study is also the first cardiovascular outcomes study to test a high, 4-gram dose of a pure-EPA only omega-3 prescription product. In the REDUCE-IT study, pure-EPA Vascepa is being studied as an adjunct to, and not as a replacement for, statin therapy. If successful, Amarin plans to seek additional indicated uses for Vascepa that extend beyond the populations studied in the successful MARINE and ANCHOR trials of Vascepa. These additional indications would potentially address tens of millions of patients in the United States and worldwide with elevated triglyceride levels despite stable statin therapy.

Amarin is blinded to the results of the REDUCE-IT study. The pooled, blinded event rate in the REDUCE-IT study is tracking to expectations for the study to continue until 2017 with results anticipated to be published in 2018. An interim review by the independent data monitoring committee of the efficacy and safety results of the trial is expected to occur during 2016 upon reaching 60% of the target aggregate number of cardiovascular events.