Orgovyx receives FDA approval for advanced prostate cancer

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FDA has approved the first oral gonadotropin-releasing hormone receptor antagonist, Orgovyx (relugolix) for adult patients with advanced prostate cancer.

Orgovyx is sponsored by Myovant Sciences inc.

Efficacy was evaluated in HERO (NCT03085095), a randomized, open label trial in men requiring at least one year of androgen deprivation therapy with either prostate cancer recurrence following radiation or surgery or newly diagnosed castration-sensitive advanced prostate cancer. Patients (N=934) were randomized (2:1) to receive relugolix 360 mg oral loading dose on the first day, followed by daily oral doses of 120 mg, or leuprolide acetate 22.5 mg injection subcutaneously every 3 months for 48 weeks.

The main efficacy outcome measure was medical castration rate defined as achieving and maintaining serum testosterone suppression to castrate levels (< 50 ng/dL) by day 29 through 48 weeks of treatment. The medical castration rate was 96.7% (95% CI: 94.9%, 97.9%) in the relugolix arm.

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