Muscles control the opening and closing of the urethra. Urine cannot flow from the bladder when the muscle is tight. When the muscle relaxes, urine flows through the urethra. Medications for BPH relax the muscles in the urethra.

Medications used for the treatment of enlarged prostate or benign prostatic hyperplasia include:

• Doxazosin (Cardura, Cardura XL)
• Tamsulosin (Flomax)
• Terazosin (Hytrin)
• Finasteride (Proscar)
• Dutasteride (Avodart)