title: Thiazide diuretic therapy and chronic photosensitivity.
abstract: Chronic photosensitivity associated with hydrochlorothiazide ingestion occurred in four patients. These patients developed a debilitating photosensitivity that persisted for months to years even after they stopped taking the diuretic. Their age range was 44 to 66 years. Phototesting with ultraviolet B (UV-B) and ultraviolet A (UV-A) radiation revealed decreased minimal erythemal doses for one or both wave bands in all patients tested. Histologic examination of skin biopsy specimens from the patients' UV-B and UV-A test sites and lesional skin revealed an acute eczematous dermatitis. Treatment with methoxsalen and UV-A radiation successfully cleared the photosensitive eruption in the patients.
mesh_terms: D000328:Adult; D000368:Aged; D002908:Chronic Disease; D005260:Female; D006801:Humans; D006852:Hydrochlorothiazide / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D011701:PUVA Therapy; D010787:Photosensitivity Disorders / Q000139:chemically induced* / Q000188:drug therapy / Q000473:pathology; D012867:Skin / Q000473:pathology
chemical_list: D006852:Hydrochlorothiazide