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Obseva Announces U.S. FDA Acceptance of New Drug Application for Linzagolix

Tuesday, November 23, 2021

Obseva SA, a biopharmaceutical company developing and commercializing novel therapies to improve women’s reproductive health,today announced that the New Drug Application (NDA) for linzagolix for the management of heavy menstrual bleeding associated with uterine fibroids in premenopausal women has been accepted for review by the United States Food and Drug Administration (FDA). The submission is based on data from the two Phase 3 PRIMROSE trials. Linzagolix has a differentiated profile and if approved, would be the first and only GnRH receptor antagonist with flexible dosing options for uterine fibroids, including a low dose option to address the needs of women who cannot or do not want to take hormones.1,4 The FDA set a target action date of September 13, 2022 for this NDA under the Prescription Drug User Fee Act (PDUFA).

“Today marks an important milestone not only in the linzagolix clinical development process, but for Obseva as a company, and most importantly, the millions of women living with uterine fibroids throughout the US. Linzagolix is a significant innovation in the field of women’s health – an area that is consistently underinvested in – and we are incredibly excited about the potential of bringing this important treatment to market” said Brian O’Callaghan, CEO of Obseva. “We are encouraged by our positive Phase 3 PRIMROSE results. If approved, we believe linzagolix will address a significant unmet need in offering a more individualized treatment option for a broader range of women.”

The Phase 3 PRIMROSE trials of linzagolix (PRIMROSE 1: US; n=574 and PRIMROSE 2: Europe and US; n=535) investigated the efficacy and safety of two dosing regimens, 100mg once daily and 200mg once daily, alone or in combination with hormonal ABT (1 mg estradiol and 0.5 mg norethisterone acetate) for the treatment of heavy menstrual bleeding associated with uterine fibroids. The NDA submission comprises positive 24-week treatment results from both studies, as well as supportive results from Week 52 and the 76-week post-treatment follow-up.

“Uterine fibroids can have a devastating impact on women’s day-to-day life. With its unique dosing options, linzagolix has the potential to significantly advance medical options for women,” stated Elizabeth Garner, MD, MPH, Chief Medical Officer of Obseva. “A dosing option without hormonal ABT would be welcomed by the significant number of women who either have contraindications to or a personal preference to avoid the use of estrogen-based therapies, while also providing a dosing option for women in whom hormonal ABT is indicated.”

The linzagolix marketing authorization application (MAA) was validated by the European Medicine Agency (EMA) with an approval recommendation from the Committee for Medicinal Products for Human Use (CHMP) expected in Q4 2021. Obseva announced previously that the company has entered into a partnership with Syneos Health to support commercialization of linzagolix in the US and EU.

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