Accelerated Approval for Zenbexus Combo in Multiple Myeloma

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FDA has granted Bristol-Myers Squibb accelerated approval for Zenbexus (iberdomide) in combination with daratumumab and hyaluronidase-fihj and dexamethasone for adults with multiple myeloma who have received at least one prior line of therapy including a proteasome inhibitor and an immunomodulatory agent.

Approval was based on data from EXCALIBER-RRMM (NCT04975997), a two-stage, randomized, multicenter, open-label trial in adults with relapsed or refractory multiple myeloma who had previously received one or two prior lines of therapy, according to an FDA release.

The major efficacy outcome measure in the trial was minimal residual disease (MRD)-negative complete response (CR) at any time. The MRD- negative CR rate at any time was 41% in the iberdomide in combination with daratumumab and hyaluronidase-fihj and dexamethasone arm and 21% in the comparative DVd arm.

FDA says the prescribing information includes a Boxed Warning for embryo-fetal toxicity and serious venous and arterial thromboembolism, as well as warnings and precautions for neutropenia, infections, and secondary primary malignancies. “Because of the risk of embryo-fetal toxicity, iberdomide is available only through a restricted distribution program called ZENBEXUS Risk Evaluation and Mitigation Strategy (REMS),” it adds.

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