Skip to Content

SHARE

Alpha-blocker medicines

Alpha-blocker medicines relax smooth muscle in the body. Smooth muscle controls the blood vessels, intestines, bladder and urinary tract, and other involuntary actions in the body.

Alpha-blockers can be used for many problems, including:

  • Prostate problems. These medicines can relax the smooth muscle in the prostate and urethra, which lets urine flow out of the body more easily.
  • Kidney stones. These medicines can relax the smooth muscle in the ureters (the tubes that move urine between the kidneys and the bladder) and make them wider, which can help a kidney stone pass more easily.
  • High blood pressure. These medicines can relax the smooth muscle in the blood vessels and make them wider, which can help lower blood pressure.

Examples of alpha-blocker medicines include alfuzosin (Uroxatral), doxazosin (Cardura), silodosin (Rapaflo), tamsulosin (Flomax), and terazosin (Hytrin).

Side effects of alpha-blockers include:

  • Dizziness, especially when standing up.
  • Headache.
  • Drowsiness.

Alpha-blockers are also called alpha-adrenergic antagonists.

Decision Points

Our interactive Decision Points guide you through making key health decisions by combining medical information with your personal information.

You'll find Decision Points to help you answer questions about:

Interactive Tools

Get started learning more about your health!

Our Interactive Tools can help you make smart decisions for a healthier life. You'll find personal calculators and tools for health and fitness, lifestyle checkups, and pregnancy.

Symptom Checker

Feeling under the weather?

Use our interactive symptom checker to evaluate your symptoms and determine appropriate action or treatment.