Q1 What is bemotrizinol approved for?
Bemotrizinol was added to the OTC Monograph M020 as a permitted sunscreen active ingredient for use in over-the-counter sunscreen drug products. The FDA’s Final Administrative Order allows bemotrizinol-containing products to be marketed without an approved application under section 505 of the FD&C Act when they conform to the monograph conditions, and specifies use in adults and children 6 months of age and older. The action establishes permitted concentrations, combinations, and dosage forms for bemotrizinol.
Q2 How does bemotrizinol work?
Bemotrizinol functions as a UV filter providing protection against both ultraviolet A (UVA) and ultraviolet B (UVB) radiation. FDA review materials and press communications noted that bemotrizinol provides broad-spectrum UV protection and was associated with low levels of systemic absorption in the data reviewed. Independent formulation studies have reported that bemotrizinol can improve photostability of certain UV-filter combinations and reduce in vitro phototoxicity in some formulations.
Q3 What is the allowed concentration or dose for bemotrizinol in OTC products?
The FDA’s Final Administrative Order permits bemotrizinol in OTC sunscreen drug products at concentrations up to 6 percent (interpreted by FDA as up to and including 6 percent) and requires that finished products provide a minimum SPF value of not less than 2. The final order also specifies permitted combinations of bemotrizinol with other sunscreen active ingredients and with certain skin protectant active ingredients, and lists allowable dosage forms. Clinicians should consult current prescribing information for complete dosing guidance.
Q4 What are the side effects of bemotrizinol?
FDA materials indicate bemotrizinol is associated with low levels of absorption through the skin and was described in agency communications as rarely causing skin irritation. FDA’s safety determination for inclusion in the monograph was based on a review of nonclinical, clinical pharmacology, and clinical safety studies and information supporting adequate evidence of safety at concentrations up to 6 percent for adults and children 6 months of age and older. Information on adverse-event frequencies for specific products containing bemotrizinol will depend on product labeling and postmarketing data.
Clinicians should consult current prescribing information for complete dosing guidance.