Isoniazid Induced Claustrophobia-a Case Report

A case of claustrophobia in a 45-year old male tuberculous in-patient receiving antituberculous drug is reported. The patient presented with the clinical features of claustrophobia after eighteen months of therapy. Isoniazid was, probably, the most likely cause since. The symptoms recurred on reintroduction of INH containing regimens. There was no recurrence of symptoms on resumption of non-Isoniazid regimen. Neurop3ychi.-Uric side-effects due to Isoniazid are well-known but Phobic neurosis due to Isoniazid was not reported till now.