Amgen Agrees to Sotorasib Dosing Trial

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Amgen says it has agreed to an FDA-proposed post-marketing requirement to conduct a multi-center randomized clinical trial to compare the safety and efficacy of Lumakras (sotorasib) at 960 mg once daily versus a lower daily dose of the drug. “Based on the preclinical, pharmacokinetic, and clinical data, Amgen intends to proceed with the previously disclosed study comparing 960 mg once daily to a 240 mg once daily dose,” the company says.

The trial agreement is part of the agency’s ongoing NDA priority review. In February, FDA accepted the sotorasib submission for treating patients with KRAS G12C-mutated locally advanced or metastatic non-small cell lung cancer (NSCLC), following at least one prior systemic therapy. The submission is based on data from the Phase 2 CodeBreaK 100 clinical trial that studied patients with locally advanced or metastatic NSCLC whose cancer had progressed despite treatment with chemotherapy and/or immunotherapy. The primary endpoint was centrally assessed objective response rate. The agency has set an 8/16 user fee review action target date.

Amgen expects the results from the dosing study in late 2022 and does not expect any impact on the timelines of the ongoing priority review.

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