Delayed reactivation of haloperidol induced photosensitive dermatitis by methotrexate.

Thami, G P; Kaur, S; Kanwar, A J · Postgrad Med J · 2002

case_report · Level V

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Abstract

A man whose psoriasis was well controlled on methotrexate treatment developed pellagra-like photosensitive dermatitis when he started taking haloperidol. Reactivation of his dermatitis was observed with methotrexate as a recall photosensitivity phenomenon. This false photosensitivity reaction of methotrexate is an important but rarely encountered adverse effect. A possible interaction between methotrexate and haloperidol is emphasised.

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