A method for predicting the phototoxicity of non‐steroidal anti‐ inflammatory drugs.

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Abstract
The photosensitisation potential of several non-steroidal anti- inflammatory drugs (NSAIDs) has been investigated in vivo using an irradiation monochromator. Evidence of abnormal, immediate photosensitivity was obtained in 13 of the 38 patients taking one of four out of seven different NSAIDs. A simple mathematical model was developed to predict the likelihood of photosensitivity occurring with a given drug by considering the mass of drug normally ingested, the spectral absorption characteristics of the drug, and the quantity and spectral quality of the radiation (e.g. sunlight) to which the patient may be exposed.