Clozapine-induced late-onset angioedema

Clozapine is an atypical antipsychotic which is generally used as a second line antipsychotic drug in clinical practice due to its side effects. It is known that Clozapine may induce hypersensitivity reaction, angioedema at the beginning of the treatment, late onset angioedema related to clozapine treatment is very rare in the literature. In this case report, we present a 19 years old man who was admitted to psychiatry with clozapine induced periorbital edema. He was receiving clozapine 200 mg per day for last two years when he applied to psychiatry. After reducing daily dose of clozapine to 150 mg, his periorbital edema regressed. It should be known that clozapine induced angioedema may develop not only at the beginning of the treatment but also during the treatment and may regress with dose reduction.