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May 1984

Allergic Reaction to Phenyl Dimethicone in a Sunscreen

Author Affiliations

Ridge-Edwards Dermatology Center 1800 N Federal Hwy Pompano Beach, FL 33062

Arch Dermatol. 1984;120(5):575-576. doi:10.1001/archderm.1984.01650410017004

To the Editor.—  Allergic reactions to silicone and its polymers are rare. A review of the literature failed to disclose any reports of this occurrence. We describe a case of allergic contact dermatitis to phenyl dimethicone in a sunscreen preparation.

Report of a Case.—  A 64-year-old woman was seen for a contact dermatitis. The patient had been in excellent health and denied the use of any medications. Approximately four weeks before the onset of the eruption, she had begun using a commercial sunscreen preparation on a regular basis. Physical examination showed a red, vesicular eruption of the face, neck, and arms.The sunscreen the patient used contained benzophenone3 and octyl dimethyl p-aminobenzoic acid as its active ingredients in a lotion vehicle. To verify allergy to the sunscreen, the patient agreed to patch testing. The sunscreen was applied to the forearm and observed for 30 minutes to rule out the possibility

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