Myovant NDA for relugolix in advanced prostrate cancer to get priority review from FDA

As recently published in the New England Journal of Medicine, relugolix demonstrated superior efficacy and a 54% lower risk of major adverse cardiovascular events compared to the current standard of care, leuprolide acetate injections, in the Phase 3 HERO study.

Myovant’s Phase 3 clinical program for advanced prostate cancer consisted of a randomized, open-label, parallel-group, multinational clinical study designed to evaluate the safety and efficacy of relugolix in over 900 men with androgen-sensitive advanced prostate cancer who required at least one year of continuous androgen deprivation therapy. Men were randomized 2:1 to receive a single loading dose of relugolix 360 mg followed by relugolix 120 mg once daily, or to treatment with leuprolide acetate 3-month depot injection, respectively.

Data from an additional key secondary endpoint, castration resistance-free survival, are expected in the third quarter of 2020. 

In May 2020, Myovant submitted a separate NDA for once-daily, oral relugolix combination tablet (relugolix 40 mg, estradiol 1.0 mg, and norethindrone acetate 0.5 mg) for women with heavy menstrual bleeding associated with uterine fibroids. A Marketing Authorization Application for relugolix combination tablet in women with moderate to severe symptoms associated with uterine fibroids is also under review by the European Medicines Agency.

Myovant submits NDA for relugolix combination tablet for the treatment of women with uterine fibroids

The NDA submission in uterine fibroids is supported by positive results from the Phase 3 LIBERTY program, which included two multinational replicate studies and an open-label extension study through one year. The NDA is the third regulatory application Myovant has submitted this year, following a Marketing Authorization Application to the European Medicines Agency in uterine fibroids and an NDA in advanced prostate cancer. Myovant is also advancing the Phase 3 SPIRIT program, evaluating relugolix combination therapy (relugolix 40 mg plus estradiol 1.0 mg and norethindrone acetate 0.5 mg) in women with pain associated with endometriosis, with data from a second Phase 3 study expected this quarter. SPIRIT 2, the first of the two Phase 3 studies of once-daily relugolix combination therapy in women with pain associated with endometriosis, met its co-primary efficacy endpoints and six key secondary endpoints. In addition, relugolix combination therapy was generally well-tolerated including minimal bone mineral density loss over 24 weeks. 

“An estimated five million women in the U.S. suffer from symptoms of uterine fibroids, which may include heavy menstrual bleeding, pain, and anemia – yet effective non-invasive treatment options are very limited,” said Lynn Seely, M.D., chief executive officer of Myovant Sciences. “If approved, we hope to redefine care for these women with relugolix combination tablet, a potential new treatment that demonstrated a predictable and clinically-meaningful reduction in menstrual blood loss while maintaining bone health in the Phase 3 LIBERTY program.”