Clinical Evidence in FDA Drug Approvals Varies Widely, Study Finds

Not every new drug approved by the U.S. Food and Drug Administration has undergone the rigorous clinical testing that physicians and their patients might expect, according to new research.

A study published Tuesday in the Journal of the American Medical Association finds that the FDA has “flexible standards” for approving of new therapies. Using publicly available information from the FDA drug database, investigators identified 188 novel therapies for treating 206 conditions approved between 2005 and 2012. Of these, 37% were approved on the basis of a single clinical trial, 38% on the basis of two trials and 25% had been tested in three or more trials.

Although most therapies were supported by at least one randomized, double-blind trial—the gold standard for clinical research—there was wide variation in the duration, size and completion rates. Comparative-effectiveness data was available for less than half of the indications.

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Source: Modern Healthcare