Disabling work-related persistent photosensitivity following photoallergic contact dermatitis from chlorpromazine and olaquindox in a pig breeder.

The use of veterinary medicines and medicated feed has a potential for the exposure of agricultural workers to pharmaceuticals with phototoxic and photoallergic side-effects. We present a 67-year-old self-employed farmer and pig breeder with a 22-year history of severe persistent photosensitivity following photoallergic contact dermatitis due to direct occupational dermal and airborne contact to chlorpromazine (sedative) and olaquindox (antibiotic and animal growth promoter, AGP). His first dermatitis symptoms appeared at the age of 45 when the pig breeding was intensified.