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FDA panel rejects risk-benefit profile of AstraZeneca cancer drug

By Thomson Reuters Apr 30, 2026 | 12:48 PM

April 30 (Reuters) – A panel of outside experts to the U.S. Food and Drug Administration voted against backing the risk-benefit profile ​of AstraZeneca’s breast cancer drug, the company ‌said on Thursday.

The FDA’s Oncologic Drugs Advisory Committee voted 3 to 6 against AstraZeneca’s experimental oral drug camizestrant, which is being developed as a first-line treatment for a ‌type ​of breast cancer whose tumors ⁠have a specific ⁠mutation.

Here are some more details:

• Six members voted against it because they disagreed with the trial design.

• AstraZeneca said it was “disappointed” by the ​outcome but remains confident in the drug’s benefit, citing a favorable safety profile.

• In a ⁠late-stage trial, the drug in ⁠combination with other cancer medicines reduced ​the risk of cancer progression or death by ​56%, keeping the disease under control for about ‌16 months on average, compared with just over nine months with standard treatment.

• The advisory panel expressed some concerns with the treatment and trial ⁠design, including whether there was a long-term benefit for patients.

• The FDA typically follows the advice of its ⁠experts but ‌is not bound to do so.

• ⁠Given the FDA’s apparent opposition to ​approval ‌in the briefing documents and the ​negative vote, ⁠J.P. Morgan analyst Richard Vosser said it is unlikely that camizestrant will be approved based on the study results.

(Reporting by Sri Hari N S, Rishab Shaju and Sriparna Roy in Bengaluru; Editing by ​Tasim Zahid)