Bullous photosensitivity to naproxen: "pseudoporphyria".

Pseudoporphyria is a photo-induced cutaneous bullous disease characterized by distinct clinical, histologic, and most recently, immunofluorescent features. By definition, results of porphyrin studies are normal in this disease. We describe here a woman with naproxen-induced pseudoporphyria, and we review previously reported cases of pseudoporphyria. The increasing frequency of pseudoporphyria is a result of the current popularity of nonsteroidal antiinflammatory drugs. Physicians need to be aware of this reversible skin disorder. Pseudoporphyria must be considered and an appropriate evaluation must be done when an individual who is taking nonsteroidal antiinflammatory drugs develops bullae and increased fragility of exposed skin.