AMAG’s Explanation For Makena's Failed Confirmatory Trial Faces Skeptical US FDA

Post hoc analyses show no convincing evidence that PROLONG trial's failure to meet its coprimary efficacy endpoints stemmed from baseline risk differences in subjects compared to an earlier trial, agency says; advisory committee is being asked whether to withdraw accelerated approval or keep the drug on the market, with or without a new confirmatory study.

Confident man, hands on hips, stands in front of a crossroad with road split in three different ways as arrows. Choosing the correct pathway between left, right and front. Difficult decision concept. - Image
A US FDA panel is being asked to choose from among three regulatory options for Makena. • Source: Shutterstock

AMAG Pharmaceuticals Inc. may be hard-pressed to persuade a US Food and Drug Administration advisory committee that Makena, an accelerated approval drug for preventing preterm birth, should remain on the market given agency skepticism about the company’s view of why the confirmatory efficacy trial failed.

At a 29 October meeting of the Bone, Reproductive and Urologic Drugs Advisory Committee, the company will assert results from...

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