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US FDA extends review of AstraZeneca’s experimental breast cancer pill

By Thomson Reuters May 27, 2026 | 1:23 AM

May 27 (Reuters) – AstraZeneca said on Wednesday the U.S. Food and Drug Administration has extended the decision deadline ​for the drugmaker’s experimental breast cancer ‌pill camizestrant to review additional data.

The delay comes after a majority of the FDA’s advisory panel in April voted against the drug in combination ‌with ​another type of therapy ⁠known as CDK4/6 ⁠inhibitor, due to concerns about the design of a key late-stage trial rather than its safety or efficacy.

The Anglo-Swedish drugmaker said ​it has submitted additional analyses requested by the FDA to support its ⁠new drug application, including ⁠data linked to longer-term efficacy ​outcomes that will be presented at a conference ​on June 2.

“We look forward to ‌continuing the dialogue with the FDA in order to bring the benefits of camizestrant with this innovative treatment strategy to ⁠eligible patients in the US as quickly as possible,” said Susan Galbraith, a senior executive at ⁠AstraZeneca, ‌in a statement.

AstraZeneca’s camizestrant pill ⁠is designed for patients with ​a ‌type of breast cancer in which ​tumours ⁠carry a specific mutation.

Last week, the European Medicines Agency’s Committee for Medicinal Products for Human Use recommended approval of the drug.

(Reporting by Ankita Bora in Bengaluru; Editing by ​Nivedita Bhattacharjee)