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To the Editor.—
I would like to record my clinical findings regarding the use of combination sunscreening products that combine both aminobenzoic acid (PABA) and a physical blocking agent (titanium dioxide) for use in patients who have had positive results to a skin for patch test PABA.In the past five years, I have had several patients in whom a patch test-confirmed photoallergic contact dermatitis developed after the use of products containing 5% PABA in an alcohol base (Pre-Sun). Initially, I gave such patients sunscreens containing only benzophenones (Uval) or zinc oxide pastes. The latter were cosmetically unacceptable, and use of the former still resulted in sunburn in some patients. I then had them use a PABA-containing product together with titanium dioxide in a cream base (Solar Cream). The preparation was not only effective as a total ultraviolet light blocker, but also the PABA-sensitive patients had no allergic reaction from
Kaminester LH. Allergic Reaction to Sunscreen Products. Arch Dermatol. 1981;117(2):66. doi:10.1001/archderm.1981.01650020006011