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FDA Commissioner Makary defends agency’s decision on Replimune’s drug, CNBC reports

By Thomson Reuters May 5, 2026 | 9:58 AM

May 5 (Reuters) – U.S. Food and Drug Administration Commissioner Dr. Marty Makary on Tuesday defended the agency’s ​decision to not approve Replimune’s ‌drug for advanced skin cancer.

“If you read our, what we call our complete response letter, you will see the details of ‌the ​FDA logic,” Makary said ⁠in an interview ⁠on CNBC.

Replimune shares were down 10% in morning trading.

Last month, the FDA declined to approve Replimune’s drug, citing ​insufficient data from studies. It said the company relied on a ⁠single‑arm study for ⁠the medicine without a control ​group.

In its rejection letter, the agency said ​the company must provide data from ‌a well-controlled trial, demonstrating adequate evidence of effectiveness.

“The FDA clearly recommended that control group. The company clearly did ⁠not do that control group. And so, by law, we can only approve drugs with ⁠substantial ‌evidence,” Makary said in the ⁠CNBC interview.

“A very simple, ​clear ‌message to the world, if ​your drug ⁠works, it’s going to get approved,” he added.

Replimune did not immediately respond to a Reuters request for comment.

(Reporting by Sriparna Roy in Bengaluru; Editing by ​Shinjini Ganguli)