Myovant Sciences and Pfizer Receive U.S. FDA Approval of MYFEMBREE®, a Once-Daily Treatment for the Management of Moderate to Severe Pain Associated With Endometriosis

•    Data from the Phase 3 SPIRIT program showed MYFEMBREE reduced menstrual pain and non-menstrual pelvic pain in premenopausal women with endometriosis, and a loss of mean bone mineral density of less than 1% from baseline through one year of treatment 
•    Myovant and Pfizer will continue to jointly commercialize MYFEMBREE, with product available immediately
•    Myovant to host conference call and webcast on Monday, August 8, 2022, at 8:30 a.m. Eastern Time / 5:30 a.m. Pacific Time

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) as a one-pill, once-a-day therapy for the management of moderate to severe pain associated with endometriosis in pre-menopausal women, with a treatment duration of up to 24 months. The approval is supported by one-year efficacy and safety data, including 24-week data from the Phase 3 SPIRIT 1 and SPIRIT 2 trials, which were published in The Lancet, and the first 28 weeks of an open-label extension study for eligible women who completed either SPIRIT 1 or SPIRIT 2. MYFEMBREE also is approved for heavy menstrual bleeding associated with uterine fibroids in pre-menopausal women. Myovant and Pfizer will continue to jointly commercialize MYFEMBREE in the U.S. and product is available immediately.

“Endometriosis is a painful, chronic disease with limited therapies to manage symptoms,” said Juan Camilo Arjona Ferreira, M.D., Chief Medical Officer of Myovant Sciences, Inc. “The new MYFEMBREE indication helps advance our mission to redefine care for women by helping address a disease with high unmet need, giving women and physicians a new meaningful treatment option to manage moderate to severe pain associated with endometriosis.”

“This approval is an important milestone reflecting Pfizer and Myovant’s commitment to women’s health in areas of significant unmet need,” said James Rusnak, M.D., Ph.D., Senior Vice President, Chief Development Officer, Internal Medicine and Hospital, Global Product Development at Pfizer. “We look forward to making MYFEMBREE available to women with endometriosis and broadening their options in managing this complex disorder.”

SPIRIT 1 and 2 each met their co-primary endpoints with 75% of women in the MYFEMBREE group in both studies achieving a clinically meaningful reduction in dysmenorrhea compared with 27% and 30% of women in the placebo groups at Week 24, respectively (both p <0.0001). For non-menstrual pelvic pain, treatment with MYFEMBREE demonstrated a clinically meaningful reduction in pain in 59% and 66% of women, compared with 40% and 43% of women in the placebo groups (p < 0.0001). Adverse reactions occurring in at least 3% of women treated with MYFEMBREE and greater than placebo were: headache, vasomotor symptoms, mood disorders, abnormal uterine bleeding, nausea, toothache, back pain, decreased sexual desire and arousal, arthralgia, fatigue, and dizziness.

Myovant Conference Call
Myovant will hold a conference call on Monday, August 8, 2022, at 8:30 a.m. Eastern Time / 5:30 a.m. Pacific Time to discuss the FDA approval of MYFEMBREE for the management of moderate to severe pain associated with endometriosis. Investors and the general public may access the live webcast here. The live webcast can also be accessed by visiting the company’s investor relations page of Myovant’s website at: https://investors.myovant.com/.

About MYFEMBREE®
MYFEMBREE (relugolix, estradiol, and norethindrone acetate) is a once-daily oral treatment approved by the U.S. Food and Drug Administration for the management of moderate to severe pain associated with endometriosis, with a treatment duration of up to 24 months. It is also currently available in the U.S. for the management of heavy menstrual bleeding associated with uterine fibroids in premenopausal women, 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.

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, Myovant has executed five successful Phase 3 clinical trials across oncology and women’s health leading to three regulatory approvals by the U.S. Food and Drug Administration (FDA) for men with advanced prostate cancer, women with heavy menstrual bleeding associated with uterine fibroids, and pre-menopausal women with moderate to severe pain associated with endometriosis, respectively. Myovant also has received regulatory approvals by the European Commission (EC) and the United Kingdom Medicines and Healthcare Products Regulatory Agency (MHRA) for women with symptomatic uterine fibroids and for men with advanced hormone-sensitive prostate cancer. Myovant has a supplemental New Drug Application under review with the FDA for updates to the United States Prescribing Information (USPI) based on safety and efficacy data from the Phase 3 LIBERTY randomized withdrawal study (RWS) of MYFEMBREE in premenopausal women with heavy menstrual bleeding due to uterine fibroids for up to two years. Myovant also is conducting a Phase 3 study to evaluate the prevention of pregnancy in women with uterine fibroids or endometriosis. Myovant also is developing MVT-602, an investigational 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 Pharma Co., Ltd., is Myovant’s majority shareholder. For more information, please visit 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.

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