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FDA Approves Darolutamide Tablets for Metastatic Hormone-Sensitive Prostate Cancer

Evidence for efficacy is based on the results from the ARASENS study
16 Aug 2022
Anticancer agents & Biologic therapy;  Genitourinary cancers

On 5 August 2022, the US Food and Drug Administration (FDA) approved darolutamide (Nubeqa, Bayer HealthCare Pharmaceuticals Inc.) tablets in combination with docetaxel for adult patients with metastatic hormone-sensitive prostate cancer (mHSPC).

Efficacy was based on ARASENS (NCT02799602), a randomised, multicentre, double-blind, placebo-controlled clinical study in 1306 patients with mHSPC. Patients were randomised to receive either darolutamide 600 mg orally twice daily plus docetaxel 75 mg/m2 intravenously administered every 3 weeks for up to 6 cycles or docetaxel plus placebo. All patients received a gonadotropin-releasing hormone analogue concurrently or had a bilateral orchiectomy.

The primary efficacy measure was overall survival (OS). Time-to-pain progression was an additional efficacy measure. Median OS was not reached (NR) (95% confidence interval [CI] NR, NR) in the darolutamide plus docetaxel arm and 48.9 months (95% CI 44.4, NR) in docetaxel plus placebo arm (hazard ratio [HR] 0.68, 95% CI 0.57, 0.80; p < 0.0001). Treatment with darolutamide and docetaxel resulted in a statistically significant delay in time-to-pain progression (HR 0.79, 95% CI 0.66, 0.95; 1-sided p = 0.006).

The median age of patients was 67 years (41 to 89) and 17% were 75 years or older. Selected demographics were reported as follows: 52% White, 36% Asian, 4% Black or African American, 7% Hispanic/Latino. In total, 3% of patients had M1a disease (spread to distant lymph nodes), 83% had M1b (spread to bones), and 14% had M1c (spread to organs).

The most common adverse reactions experienced by patients (incidence ≥10% with a ≥2% increase over placebo with docetaxel) were constipation, decreased appetite, rash, haemorrhage, increased weight, and hypertension. The most common laboratory test abnormalities (≥30%) were anaemia, hyperglycaemia, decreased lymphocyte count, decreased neutrophil count, increased AST, increased ALT, and hypocalcaemia.

The recommended darolutamide dose for mHSPC is 600 mg (two 300 mg tablets) taken orally, twice daily, with food until unacceptable toxicity or disease progression. Docetaxel, 75 mg/m2 intravenously is administered every 3 weeks for up to 6 cycles. The first dose of docetaxel should be administered within 6 weeks after the start of darolutamide treatment.

Full prescribing information for Nubega is available here.

This review was conducted under Project Orbis, an initiative of the FDA Oncology Center of Excellence (OCE). Project Orbis provides a framework for concurrent submission and review of oncology drugs among international partners. For this review, FDA collaborated with Health Canada, the Singapore Health Sciences Authority, Switzerland’s Swissmedic, the United Kingdom’s Medicines and Healthcare products Regulatory Authority, and Australia’s Therapeutic Goods Administration. The application reviews may be ongoing at the other regulatory agencies.

This review used the Real-Time Oncology Review pilot programme, which streamlined data submission prior to the filing of the entire clinical application, and the Assessment Aid, a voluntary submission from the applicant to facilitate the FDA’s assessment. The FDA approved this application approximately one month ahead of the FDA goal date.
This application was granted priority review.

Healthcare professionals should report all serious adverse events suspected to be associated with the use of any medicine and device to FDA’s MedWatch Reporting System.

For assistance with single-patient INDs for investigational oncology products, healthcare professionals may contact OCE’s Project Facilitate.

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