Myovant Sciences and Pfizer Receive FDA Approval for MYFEMBREE®, the First Once-Daily Treatment for Heavy Menstrual Bleeding Associated With Uterine Fibroids

  • In the Phase 3 LIBERTY 1 and LIBERTY 2 studies, MYFEMBREE demonstrated 72.1% and 71.2% response rates in menstrual blood loss (MBL) at Week 24, with MBL reductions of 82.0% and 84.3% from baseline
  • Myovant and Pfizer will jointly commercialize MYFEMBREE, with product availability expected in June

BASEL, Switzerland and NEW YORK, NY, USA I May 26, 2021 I Myovant Sciences (NYSE: MYOV) and Pfizer Inc. (NYSE: PFE) today announced that the U.S. Food and Drug Administration (FDA) has approved MYFEMBREE® (relugolix 40 mg, estradiol 1 mg, and norethindrone acetate 0.5 mg), the first once-daily treatment for the management of heavy menstrual bleeding associated with uterine fibroids in premenopausal women, with a treatment duration of up to 24 months. The approval is supported by efficacy and safety data from the Phase 3 LIBERTY 1 and LIBERTY 2 studies, which were published in the New England Journal of Medicine. Under the terms of their previously announced collaboration, Myovant and Pfizer will jointly commercialize MYFEMBREE in the U.S. MYFEMBREE is expected to be available in June 2021.

“With MYFEMBREE, we can offer women with uterine fibroids a non-invasive treatment that provides clinically meaningful symptom relief for heavy menstrual bleeding with one pill, once-a-day,” said Ayman Al-Hendy, M.D., Ph.D., Professor of Obstetrics and Gynecology, University of Chicago, and LIBERTY Program Steering Committee Member. “The FDA approval of MYFEMBREE represents a significant milestone in expanding treatment options for uterine fibroids, a chronic and debilitating disease for many women in the U.S.”

“Uterine fibroids affect millions of women in the U.S. and account for over 250,000 hysterectomies each year, with heavy menstrual bleeding being one of the most bothersome symptoms,” said David Marek, Chief Executive Officer of Myovant Sciences, Inc. “The approval of MYFEMBREE represents the second FDA product approval for Myovant in less than one year. This is an important step forward as we seek to redefine care for women and for men, not only through new medicines but through continued collaboration with the community.”

“MYFEMBREE’s approval is a testament to the shared commitment between Myovant and Pfizer to support women living with uterine fibroids,” said Nick Lagunowich, Global President, Internal Medicine at Pfizer. “We are excited to offer this new treatment option which will help provide much needed symptom relief with the convenience of an oral, once-daily tablet.”

The Phase 3 LIBERTY studies each met the primary endpoint, with 72.1% and 71.2% of women in the MYFEMBREE groups achieving the responder criteria compared with 16.8% and 14.7% of women in the placebo groups at Week 24, respectively (both p < 0.0001). A response was defined as a menstrual blood loss volume of less than 80 mL and a 50% or greater reduction from baseline in menstrual blood loss volume during the last 35 days of treatment measured using the alkaline hematin method. Women receiving MYFEMBREE experienced reductions of 82.0% and 84.3% in menstrual blood loss from baselines, respectively (both p < 0.0001 compared to placebo). Adverse reactions occurring in at least 3% of women treated with MYFEMBREE and at a greater incidence than placebo were hot flush, abnormal uterine bleeding, alopecia, and decreased libido. There were no pregnancies reported in the MYFEMBREE groups in either study.

Myovant and Pfizer are committed to supporting women in the U.S. who are prescribed MYFEMBREE throughout their treatment journeys. The MYFEMBREE Support Program provides services, including insurance benefits checks, prior authorization support, co-pay support for commercially insured patients, and patient assistance for qualifying uninsured patients. Program terms and conditions apply. For more information and additional resources, please contact 833-MYFEMBREE (833-693-3627), 8 a.m.–8 p.m. Eastern Time, Monday–Friday.

Myovant Conference Call and Webcast
Myovant will hold a conference call on Friday, May 28, 2021 at 8:30 a.m. Eastern Time / 5:30 a.m. Pacific Time to discuss the FDA approval of MYFEMBREE®. Investors and the general public may access a live webcast of the call by visiting the investor relations page of Myovant’s website at investors.myovant.com. Investors and analysts may also participate in the conference call by dialing 1-800-532-3746 in the U.S. or +1-470-495-9166 from outside the U.S. A replay of the webcast will be archived on Myovant’s investor relations website.

About Uterine Fibroids
Uterine fibroids are noncancerous tumors that develop in or on the muscular walls of the uterus and are among the most common reproductive tract tumors in women. In addition to an individual's genetic predisposition, estrogens are well known to play an important role in the regulation of fibroid growth.

Although uterine fibroids are benign tumors, they can cause debilitating symptoms such as heavy menstrual bleeding (frequently resulting in anemia and fatigue), pain (including painful periods, abdominal pain, painful intercourse, backache), increased abdominal girth and bloating, urinary frequency or retention, constipation, pregnancy loss, and, in some cases, infertility. These symptoms can also lead to loss of productivity at work, limitations in normal activities of daily living, and social embarrassment.

An estimated five million women in the U.S. suffer from symptoms of uterine fibroids, and an estimated three million women are inadequately treated by current medical therapy and require further treatment.

About MYFEMBREE®
MYFEMBREE (relugolix 40 mg, estradiol 1 mg, and norethindrone acetate 0.5 mg) is the first once-daily treatment for heavy menstrual bleeding associated with uterine fibroids in premenopausal women approved by the U.S. Food and Drug Administration, with a treatment duration of up to 24 months. MYFEMBREE contains relugolix, which reduces the amount of estrogen (and other hormones) produced by ovaries, estradiol (an estrogen) which may reduce the risk of bone loss, and norethindrone acetate (a progestin) which is necessary when women with a uterus (womb) take estrogen.

For full prescribing information including Boxed Warning and patient information, please click here.

Indications and Usage

MYFEMBREE is indicated for the management of heavy menstrual bleeding associated with uterine leiomyomas (fibroids) in premenopausal women. Limitations of Use: Use of MYFEMBREE should be limited to 24 months due to the risk of continued bone loss which may not be reversible.

About Myovant Sciences 
Myovant Sciences aspires to redefine care for women and for men through purpose-driven science, empowering medicines, and transformative advocacy. Founded in 2016, we have two FDA-approved products. ORGOVYX™ (relugolix) was approved by the U.S. Food and Drug Administration in 2020 as the first and only oral gonadotropin-releasing hormone (GnRH) receptor antagonist for the treatment of adult patients with advanced prostate cancer, and relugolix is also under regulatory review in Europe for men with advanced prostate cancer. MYFEMBREE® (relugolix 40 mg, estradiol 1 mg, and norethindrone acetate 0.5 mg) was approved in the U.S. in 2021 as the first once-daily treatment for the management of heavy menstrual bleeding associated with uterine fibroids in premenopausal women. Relugolix combination tablet (relugolix 40 mg, estradiol 1 mg, and norethindrone acetate 0.5 mg) is under regulatory review in Europe for women with uterine fibroids, has completed Phase 3 registration-enabling studies for women with endometriosis, and is being assessed for contraceptive efficacy in healthy women ages 18-35 years who are at risk for pregnancy. We are also developing MVT-602, an oligopeptide kisspeptin-1 receptor agonist, which has completed a Phase 2a study for female infertility as part of assisted reproduction. Sumitovant Biopharma, Ltd., a wholly owned subsidiary of Sumitomo Dainippon Pharma Co., Ltd., is our majority shareholder. For more information, please visit our website at www.myovant.com. Follow @Myovant on Twitter and LinkedIn.

About Pfizer: Breakthroughs That Change Patients’ Lives
At Pfizer, we apply science and our global resources to bring therapies to people that extend and significantly improve their lives. We strive to set the standard for quality, safety and value in the discovery, development and manufacture of health care products, including innovative medicines and vaccines. Every day, Pfizer colleagues work across developed and emerging markets to advance wellness, prevention, treatments and cures that challenge the most feared diseases of our time. Consistent with our responsibility as one of the world's premier innovative biopharmaceutical companies, we collaborate with health care providers, governments and local communities to support and expand access to reliable, affordable health care around the world. For more than 170 years, we have worked to make a difference for all who rely on us. We routinely post information that may be important to investors on our website at www.Pfizer.com. In addition, to learn more, please visit us on www.Pfizer.com and follow us on Twitter at @Pfizer and @Pfizer News, LinkedIn, YouTube and like us on Facebook at Facebook.com/Pfizer.

SOURCE: Myovant

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