Phototoxicity
Chemically-induced skin irritation following exposure to light / From Wikipedia, the free encyclopedia
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Phototoxicity, also called photoirritation, is a chemically induced skin irritation, requiring light, that does not involve the immune system.[1] It is a type of photosensitivity.[1][2]
Phototoxicity | |
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Other names | Photoirritation |
Effect of the common rue on skin in hot weather. | |
Specialty | Dermatology |
The skin response resembles an exaggerated sunburn. The involved chemical may enter into the skin by topical administration, or it may reach the skin via systemic circulation following ingestion or parenteral administration. The chemical needs to be "photoactive," which means that when it absorbs light, the absorbed energy produces molecular changes that cause toxicity. Many synthetic compounds, including drug substances like tetracyclines or fluoroquinolones, are known to cause these effects. Surface contact with some such chemicals causes photodermatitis, and many plants cause phytophotodermatitis. Light-induced toxicity is a common phenomenon in humans; however, it also occurs in other animals.