Life-threatening haematemesis associated with clozapine: a case report and literature review.

Clozapine is regarded as a second-line and in some cases last-line antipsychotic known for its common life-threatening side effects, such as agranulocytosis, constipation and cardiomyopathies, but rarely haematemesis. We report a case of severe haemetemesis in a chronic schizophrenic patient managed with clozapine. The patient was a 46-year-old male being managed for chronic schizophrenia with treatment resistance who developed sudden severe haematemesis following commencement of clozapine for 6 weeks. The patient had 1.1 l of blood transfusion. The relevant literature is reviewed. Clozapine can be associated with a life-threatening haematemesis. Psychiatrists and other medical specialists need to be alert to the fatality of clozapine-induced haematemesis in the treatment of psychiatric disorders.