FDA Sunscreen MUsT’s ‘Real World’ Applicability Under Debate, Which Could Hold Up Testing
Spaulding Clinical, which the FDA contracted for its sunscreen maximal usage trial published in May, is in discussions with a handful of sunscreen industry players about doing more MUsTs to fulfill data needs identified by the agency. Meanwhile, leading trade groups are interested in talking to the FDA about developing sunscreen study protocols that more accurately reflect real-world consumer usage.
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The FDA emphasizes that findings from its second, more extensive clinical study on the absorption potential of sunscreen active ingredients are not in themselves signals that the UV filters are unsafe. However, they portend heavy work ahead for industry if the ingredients are to remain GRASE and available for use in OTC sunscreen drug products stateside.
Personal Care Product Council submits work plan to FDA setting 2023 date for completing MUsT trial on one of eight UV filters, with additional trials to follow. Research firm considers the estimate consistent with the industry's experience with the trials, but says it could design and conduct the required pilot and pivotal studies in six months.
Changes in tentative final OTC sunscreen monograph would increase testing costs than FDA estimates and leave consumers with fewer, more expensive products to choose from, say CHPA and PCPC. Firms estimate testing costs will increase roughly 25% to 30% based on proposed changes in protocols.