Interchangeable Biosimilars: FDA Clarifies US Reference Not Mandatory For Studies

Draft guidance strongly recommends against it, but US FDA's Leah Christl says agency is willing to talk about using foreign-licensed comparators.

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The US FDA may not strictly adhere to the hardline stance against using foreign-licensed reference products in interchangeability studies conveyed in its draft guidance. The door apparently is open to applications that rely on non-US products, even though the agency does not recommend it.

Leah Christl, associate director for therapeutic biologics in FDA's Office of New Drugs, tried to make clear Oct. 25 during...

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