부산대학교 도서관

A 41-year-old man developed urticaria, diarrhea, and hypotension following dental treatment for root-canal disinfection. The medications used included formaldehyde paste. He also developed urticaria after dental treatment 2 months prior. His symptoms improved after intramuscular injection of adrenaline, and intravenous injection of steroids and antihistamine. Based on his history of symptoms after dental treatment using formaldehyde paste and positivity to a specific immunoglobulin E against formalin, we diagnosed him with a type I allergy to formaldehyde. Many cases of immediate allergic reactions to formaldehyde have been reported. As the allergic symptoms to formaldehyde-containing medicaments have a delayed onset, clinicians may miss the cause if they do not take a full patient history.