Amgen (NASDAQ:AMGN) today announced new data from the HER-MES study, the first and only head-to-head study of Aimovig^??(erenumab-aooe), a calcitonin gene-related peptide (CGRP) inhibitor, against topiramate for adult patients with episodic and chronic migraine. Topiramate is one of the most commonly prescribed medications in migraine prevention with an estimated 600,000 new-to-brand prescriptions written in the U.S. each year.^1,2?Published in?Cephalalgia,?the results of the study conducted by Novartis showed that patients in the Aimovig treatment arm experienced a significantly lower discontinuation rate due to adverse events and superior efficacy, with a greater proportion of patients achieving at least a 50 percent reduction from baseline in their monthly migraine days (MMDs), compared with topiramate.³ "HER-MES is the first study that directly compared the therapeutic effects of an antibody and a small molecule in migraine prevention," said?Uwe Reuter, M.D., Ph.D., MBA, trial investigator and managing medical director at Charit? Universit?tsmedizin in?Berlin. "The positive outcomes strengthen the efficacy and safety profile of erenumab as a migraine prevention treatment?for patients with migraine." In this head-to-head Phase IV study, patients in the Aimovig arm demonstrated a significantly lower discontinuation rate due to adverse events versus patients in the topiramate arm (10.6% versus 38.9%).?Additionally, significantly more patients in the Aimovig arm achieved at least a 50% reduction from baseline in their MMDs than those in the topiramate group (55.4% versus 31.2%). In the topiramate group, the most frequent adverse events that led to discontinuation of the study medication were paraesthesia, disturbance in attention, fatigue, and nausea. In the Aimovig group, these were fatigue, nausea, disturbance in attention and dizziness. Additional study treatment-related adverse events reported by =2% in any trial group included constipation, decreased appetite, taste disorder, vertigo, dysgeusia, weight loss, dry mouth, irritability, mood swings, diarrhea, depression, sleep disorder, depressed mood, hypoesthesia, upper abdominal pain, aphasia, insomnia, memory impairment, dyspepsia, dysesthesia and headache.³ "We're extremely encouraged by these new results, which demonstrate lower discontinuation rates due to adverse events and superior efficacy versus topiramate in migraine prevention and strengthen our confidence that Aimovig has significant potential to help many more patients living with migraine," said?Rob Lenz, M.D., Ph.D., senior vice president of Global Development at Amgen. "Amgen is dedicated to helping the millions of people who live with this debilitating neurological disease get back to what's important to them while living with more migraine-free days." Migraine is a highly debilitating disease that has a significant impact on people's lives, including time spent with family and friends, or at work.^4,5?Aimovig is the first FDA-approved migraine preventive treatment that targets the CGRP receptor.⁶?It is self-administered once monthly subcutaneously via the SureClick^??autoinjector, does not require a loading dose and is easy to use.^6,7 About HER-MES
HER-MES (NCT03828539) is the first randomized, double-blind, double-dummy, active-controlled, parallel-group Phase IV study to assess tolerability (as assessed by the discontinuation rates due to adverse events) and efficacy of Aimovig?versus topiramate in a patient-centered setting.³?The primary endpoint was treatment discontinuation rate due to adverse events of 70 mg and 140 mg Aimovig monthly compared with 50 to 100 mg topiramate daily during the double-blind treatment phase of the study.³?The secondary endpoint was efficacy of 70 mg and 140 mg Aimovig monthly versus 50 to 100 mg topiramate daily in terms of at least a 50% reduction in monthly migraine days from baseline in the last three months (months 4, 5 and 6) of the double-blind, 24-week treatment phase.³?The HER-MES study enrolled 777 adult patients with episodic or chronic migraine (=4 migraine days per month) who had not previously received migraine prevention treatment or had failed up to three previous therapies with propranolol/metoprolol, amitriptyline and/or flunarizine.³?After the 2-week screening and 4-week baseline phase, patients received either Aimovig subcutaneously and topiramate placebo orally or topiramate orally and Aimovig placebo subcutaneously. In the double-blind, 24-week treatment phase, patients in the Aimovig arm received either 70 mg or 140 mg directly after the baseline phase, as estimated by the investigator.³?An increase in dose from 70 mg to 140 mg was possible at any time during the study. Patients in the topiramate arm were given topiramate at the highest tolerated dose (50-100 mg daily), starting with a 6-week titration phase.³?The study was conducted by Novartis at 82 study sites in?Germany?between?February 2019?and?July 2020. About?Aimovig^??(erenumab-aooe)?
Aimovig is the first FDA-approved migraine preventive treatment that targets the calcitonin gene-related peptide (CGRP) receptor, which is associated with migraine.^6?Aimovig has been studied in several large, global, randomized, double-blind, placebo-controlled studies to assess its efficacy and safety in migraine prevention.^8,9?Aimovig is self-administered once monthly via the easy-to-use SureClick^??autoinjector, without a required loading dose.^6,7?More than 3,000 patients participated in registrational trials of Aimovig across four placebo-controlled Phase 2 and Phase 3 clinical studies and their open-label extensions.^8-13 Aimovig is also being evaluated through CATALYST, a comprehensive evidence generation program initiated by Amgen and Novartis that includes over 7,500 patients across ongoing clinical trials and a robust assessment of real-world evidence. Spanning over 39 countries globally, CATALYST clinical trials will explore the role of Aimovig in comparative studies, assessing impact on novel migraine outcomes, understanding predictive biomarkers and investigating Aimovig's use in additional study populations. To date, more than 500,000 patients in?the United States?have been prescribed Aimovig for the preventive treatment of migraine in adults.¹⁴ AIMOVIG INDICATION
Aimovig^??(erenumab-aooe) is indicated for the preventive treatment of migraine in adults. IMPORTANT SAFETY INFORMATION
Contraindication:?Aimovig^??is contraindicated in patients with serious hypersensitivity to erenumab-aooe or to any of the excipients. Reactions have included anaphylaxis and angioedema. Hypersensitivity Reactions: Hypersensitivity reactions, including rash, angioedema, and anaphylaxis, have been reported with Aimovig^??in postmarketing experience. Most reactions were not serious and occurred within hours of administration, although some occurred more than one week after administration. If a serious or severe reaction occurs, discontinue Aimovig^??and initiate appropriate therapy. Constipation with Serious Complications: Constipation with serious complications has been reported following the use of Aimovig^??in the postmarketing setting. There were cases that required hospitalization, including cases where surgery was necessary. The onset of constipation was reported after the first dose in a majority of these cases, but patients also reported later on in treatment. Aimovig^??was discontinued in most reported cases. Constipation was one of the most common (up to 3%) adverse reactions reported in clinical studies. Monitor patients treated with Aimovig^??for severe constipation and manage as clinically appropriate. Concurrent use of medications associated with decreased gastrointestinal motility may increase the risk for more severe constipation and the potential for constipation-related complications. Hypertension:?Development of hypertension and worsening of pre-existing hypertension have been reported following the use of Aimovig^??in the postmarketing setting. Many of the patients had pre-existing hypertension or risk factors for hypertension. There were cases requiring pharmacological treatment and, in some cases, hospitalization. Hypertension may occur at any time during treatment but was most frequently reported within seven days of dose administration. In the majority of the cases, the onset or worsening of hypertension was reported after the first dose. Aimovig^??was discontinued in many of the reported cases. Monitor patients treated with Aimovig^??for new-onset hypertension, or worsening of pre-existing hypertension, and consider whether discontinuation of Aimovig^??is warranted if evaluation fails to establish an alternative etiology. Adverse Reactions: The most common adverse reactions in clinical studies (= 3% of Aimovig^?-treated patients and more often than placebo) were injection site reactions and constipation. Please see Aimovig^??full?Prescribing Information. About Migraine
People with frequent migraine attacks may lose more than half their life to migraine.^17,16?They endure debilitating pain, physical impairment, and can live in constant dread of the next attack ? all of which is compounded by a widespread misperception of the disease.^5,17?The 2019 Global Burden of Disease Study ranks migraine among the top 10 causes of years lived with disability worldwide.¹⁸?Migraine is associated with personal and societal burdens of pain, disability and financial cost, and it remains under-recognized and under-treated.^5,19 About Amgen?
Amgen is committed to unlocking the potential of biology for patients suffering from serious illnesses by discovering, developing, manufacturing and delivering innovative human therapeutics. This approach begins by using tools like advanced human genetics to unravel the complexities of disease and understand the fundamentals of human biology. Amgen focuses on areas of high unmet medical need and leverages its expertise to strive for solutions that improve health outcomes and dramatically improve people's lives. A biotechnology pioneer since 1980, Amgen has grown to be?one of?the world's?leading?independent biotechnology companies, has reached millions of patients around the world and is developing a pipeline of medicines with breakaway potential. For more information, visit?www.amgen.com?and follow us on?www.twitter.com/amgen. Amgen Forward-Looking Statements
This news release contains forward-looking statements that are based on the current expectations and beliefs of Amgen. 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An outbreak of disease or similar public health threat, such as COVID-19, and the public and governmental effort to mitigate against the spread of such disease, could have a significant adverse effect on the supply of materials for our manufacturing activities, the distribution of our products, the commercialization of our product candidates, and our clinical trial operations, and any such events may have a material adverse effect on our product development, product sales, business and results of operations. We rely on collaborations with third parties for the development of some of our product candidates and for the commercialization and sales of some of our commercial products. In addition, we compete with other companies with respect to many of our marketed products as well as for the discovery and development of new products. Further, some raw materials, medical devices and component parts for our products are supplied by sole third-party suppliers. 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Our business performance could affect or limit the ability of our Board of Directors to declare a dividend or our ability to pay a dividend or repurchase our common stock. We may not be able to access the capital and credit markets on terms that are favorable to us, or at all. Any scientific information discussed in this news release relating to new indications for our products is preliminary and investigative and is not part of the labeling approved by the U.S. Food and Drug Administration for the products. The products are not approved for the investigational use(s) discussed in this news release, and no conclusions can or should be drawn regarding the safety or effectiveness of the products for these uses. References

1. Luo N, Di W, Zhang A, et al. A Randomized, One-Year Clinical Trial Comparing the Efficacy of Topiramate, Flunarizine, and a Combination of Flunarizine and Topiramate in Migraine Prophylaxis. Pain Medicine.?January 2012.
2. Data on File. Amgen.?September 2021
3. Reuter U, Ehrlich M, Gendolla A, et al. Erenumab versus topiramate for the prevention of migraine ? a randomized, double-blind, active-controlled phase 4 trial. Cephalalgia.?November 2021.
4. Russo AF. Annu Rev Pharmacol Toxicol. 2015;55:533-552.
5. Lipton R, Bigal ME, Diamond M, et al. Migraine prevalence, disease burden, and the need for preventive therapy. Neurology. 2007;68(5)343-349.
6. Aimovig^??(erenumab-aooe) prescribing information, Amgen,?May 2021.
7. Mead J, et al. Patient Reported Ease of Use with Disposable Autoinjector in Individuals with Migraine. Patient Preference and Adherence. 2020.
8. Sun H, Dodick DW, Silberstein S, et al. Safety and efficacy of AMG 334 for prevention of episodic migraine: a randomised, double-blind, placebo-controlled, phase 2 trial. Lancet Neurol. 2016;15(4):382-390. doi:10.1016/S1474-4422(16)00019-3.
9. Tepper S, Ashina M, Reuter U, et al. Safety and efficacy of erenumab for preventive treatment of chronic migraine: a randomised, double-blind, placebo-controlled phase 2 trial. Lancet Neurol. 2017;16(6):425-434. doi:10.1016/S1474-4422(17)30083-2.
10. Ashina M, Goadsby P, Reuter U, et al. Long-term safety and efficacy of erenumab in patients with episodic migraine: Results from a 5-year, open-label extension study. Cephalalgia. 2020;26(3).
11. Reuter U, Goadsby PJ, Lanteri-Minet M, et al. Efficacy and tolerability in patients with episodic migraine whom two-to-four previous preventive treatments were unsuccessful: a randomised, double blind, placebo-controlled, phase?3b?study. The Lancet. 2018(22)10.
12. Wang S-J, Roxas Jr, A, Saravia B, et al. Randomised, controlled trial of erenumab for the prevention of episodic migraine in patients from?Asia, the?Middle East, and?Latin America: The EMPOwER study. Cephalalgia. 2021(25)6.
13. Goadsby PJ, Reuter U, Hallstr?m Y, et al. A controlled trial of erenumab for episodic migraine. N Engl J Med. 2017;377(22):2123-2132.
14. Data on File. Amgen.?September 2021
15. Headache Classification Committee of the International Headache Society (IHS). The International Classification of Headache Disorders, 3rd edition. Cephalalgia. 2018;38(1):1-211.
16. Lipton R, Stewart WF, Diamond S, et al. Prevalence and burden of migraine in?the United States: data from the American Migraine Study II. Headache. 2001;41(7):1-211.
17. Rutberg S, Ohrling K. Migraine ? more than a headache: Women's experiences of living with migraine. Disabil Rehabil. 2012;34(4):329-336.
18. Steiner, T.J., Stovner, L.J., Jensen, R. et al. Migraine remains second among the world's causes of disability, and first among young women: findings from GBD2019. J Headache Pain 2020.
19. Diamond S, Bigal ME, Silberstein S, et al. Patterns of diagnosis and acute and preventive treatment for migraine in?the United States: results from the American Migraine Prevalence and Prevention study. Headache. 2007;47(3):355-363.

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