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Oncopeptides’ Pepaxto Needs New Study To Identify Population That Will Benefit, FDA Panel Says

Executive Summary

Advisory committee votes 14-2 that melflufen’s benefit-risk profile is unfavorable in the current accelerated approval indication for fifth-line treatment of multiple myeloma; panel rejects sponsor’s attempt to rely on post hoc analyses to 'carve out' a subpopulation that, it asserts, is responsible for negative overall survival trend in OCEAN confirmatory trial.

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Fighting Accelerated Approval Withdrawal Hinders Other Sponsors' Applications, FDA’s Pazdur Says

Resource-intensive withdrawal process means FDA reviewers are not able to work on other drugs, Oncology Center of Excellence Director Richard Pazdur says, citing the ‘arduous’ withdrawal of Pepaxto. Pazdur also says no one should be surprised that the FDA has begun issuing complete response letters when confirmatory studies are not sufficiently advanced.

New Accelerated Approval Withdrawal Process More Streamlined, Marks Says

OCE Director Richard Pazdur was less sanguine, however, noting that while the Pepaxto withdrawal may have been faster than others, it still required more than 60 meetings to complete.

Pepaxto Withdrawal Dispute: Oncopeptides Details Plans For New Studies

An observational single-arm study and a dose-optimization study are planned if the FDA does not withdraw accelerated approval of the multiple myeloma drug, Oncopeptides says. If an additional confirmatory trial is needed, company suggests two different approaches, one of which is almost a repeat of the OCEAN study, the results of which remain in dispute.

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