A Case of Mucosal Fixed Drug Eruption Caused by Tamsulosin Administration.

Fixed drug eruption (FDE) is a rare type of drug reaction that involves the skin and, less commonly, the mucosal membranes. It is characterized by clinically well-defined erythematous patches or plaques with or without blisters, which relapse at the same location if the causative agent is readministered. Tamsulosin is an alpha-1 adrenergic receptor blocker used to treat benign prostatic hyperplasia, and its common side effects are dizziness and headache. Only one case of cutaneous FDE due to tamsulosin administration has been reported but no other case of mucosal involvement has been reported to date. Therefore, we present a case of mucosal FDE caused by tamsulosin administration along with a literature review.