photoallergic


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photoallergy

 [fo″to-al´er-je]
a delayed immunologic type of photosensitivity involving both a chemical substance to which the individual has become previously sensitized and radiant energy.

photoallergic

[-əlur′gik]
Etymology: Gk, phos, light, allos, other, ergein, to work
exhibiting a delayed hypersensitivity reaction after exposure to light. Compare phototoxic. See also photoallergic contact dermatitis.
References in periodicals archive ?
Photosensitive skin reactions can be the consequence of topical or systemic use of the drug, where phototoxic or photoallergic reactions can occur as a side effect (8-11).
Photoallergic drug reactions are idiosyncratic cell-mediated hypersensitivity responses, in contrast with phototoxic reactions, which clinically resemble exaggerated sunburn, and are predictable, with severity dependent on the dose of the drug and the extent of exposure to light.
Photoallergic tendencies, xenoestrogen with interference of thyroid function and CNS signaling.
Cook N, Freeman S: Report of 19 cases of photoallergic contact dermatitis to sunscreens seen at the Skin and Cancer Foundation.
Five earlier safety studies involving a total of 667 patients showed no phototoxicity, contact hypersensitivity, irritation, photoallergic response, or sensitization.
A total of five dermal safety studies showed no phototoxicity, irritation, photoallergic response, sensitization, or contact hypersensitivity.
Photoallergic reactions are based on immunological mechanism and can be provoked by UV radiation only in a small minority of people, who have been sensitised on previous exposure to the photosensitiser.
Photoallergic reactions are rare today, except in response to sunscreen ingredients.