FDA Final MUsT Guidance For Topical OTCs Bolstered By Agency's Recent Study Results

FDA final guidance on MUsTs for topically applied ingredients for OTC drug monograph affirms draft, not incorporating changes pushed by industry. CHPA says FDA’s MUsT study published recently finding sunscreen actives penetrate skin to bloodstream at higher levels than previously believed demonstrates "value" of test method.

Sun screen

The US Food and Drug Administration's final guidance on incorporating Maximal Usage Trials (MUsT) for topically applied ingredients for the OTC drug monograph is not changed from a 2018 draft despite industry’s push for alternative approaches to estimating dermal penetration.

In a May 9 statement, the agency says the final guidance with recommendations for in vivo absorption trials for...

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