Promising Data Reported with Relugolix in Endometriosis
Myovant Sciences and Pfizer say that data from the Phase 3 SPIRIT long-term extension study of an investigational once-daily relugolix combination therapy (relugolix 40 mg plus estradiol 1.0 mg and norethindrone acetate 0.5 mg) in women with endometriosis showed clinically meaningful reductions in dysmenorrhea (menstrual pain) and non-menstrual pelvic pain over one year with minimal and stable bone mineral density loss. They say the data are consistent with the efficacy and safety profile observed through 24 weeks in the Phase 3 SPIRIT 1 and SPIRIT 2 studies. The companies plan to include the data in a planned NDA that is expected to be submitted in the first half this year. Endometriosis is a common painful condition that affects about 10% of women during their reproductive lifetime, according to the companies.
In December, Myovant and Pfizer entered into an agreement to develop and commercialize relugolix in oncology and women’s health in the U.S. and Canada. Under the terms of the agreement, Myovant and Pfizer will jointly develop and commercialize Orgovyx (relugolix) in advanced prostate cancer and, if approved, relugolix combination tablet (relugolix 40 mg, estradiol 1.0 mg, and norethindrone acetate 0.5 mg) in uterine fibroids and endometriosis. FDA 12/18 approved Orgovyx (relugolix) for prostate cancer, calling it the first oral drug in its class, and it may eliminate some patients’ need to visit the clinic for treatments that require administration by a health care provider.