Tamsulosin-Induced Gynecomastia: Reversible Adverse Effect
Abstract
A 68-year-old man with lower urinary tract symptoms on tamsulosin and tadalafil presented to his primary care physician with left breast fullness. A mammogram showed benign gynecomastia. There was no evidence of hypogonadism, hyperthyroidism, or liver or kidney disease, and he had never taken a 5α-reductase inhibitor. Upon discontinuing tamsulosin, the gynecomastia completely resolved over the ensuing 2 months. This is a case of tamsulosin-induced gynecomastia, an adverse reaction not commonly associated with α1-adrenergic receptor antagonists.
Fields of Study & Subjects
Male Breast Health Studies
Body Contouring and Surgery
Menopause: Health Impacts and Treatments
Publication details
- Journal / source
- Annals of Internal Medicine Clinical Cases
- Publisher
- American College of Physicians
- Volume
- 5
- Issue
- 7
- Publication date
- 1 July 2026
- Language
- EN