A Third of Drug Approvals have Post-market Safety Issues: JAMA

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A new study published in JAMA finds that nearly a third of recently approved drugs resulted in adverse events that led to new boxed warnings or safety alerts. Researchers examined more than 222 new drug and biologics approvals from 2001 through 2010. They documented 123 significant postmarket safety events (3 withdrawals, 61 boxed warnings, and 59 safety communications) during a median follow-up period of 11.7 years, affecting 32% of the novel therapeutics. “The median time from approval to first postmarket safety event was 4.2 years, and the proportion of novel therapeutics affected by a postmarket safety event at 10 years was 31%, Yale University School of Medicine researcher Joseph S. Ross and colleagues write.

 

Postmarket safety events were significantly more frequent among biologics, those receiving accelerated approval, and those with near-regulatory deadline approval, the researchers say. “Events were significantly less frequent among those with regulatory review times less than 200 days.”


The authors also note that the majority of pivotal trials that form the basis for FDA approval for the products enroll fewer than 1,000 patients with follow-up of six months or less — making it a challenge to identify uncommon or long-term serious safety risks. They add that limited exposure in the premarket stage highlights “the need for continuous monitoring of the safety of novel therapeutics throughout their life cycle.”

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