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Spironolactone (speer on oh lak' tone)
Other names: Aldactone
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Spironolactone has caused tumors in laboratory animals. Talk to your doctor about the risks and ... Full Alert
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Why is this medication prescribed?

Spironolactone is used to treat certain patients with hyperaldosteronism (the body produces too much aldosterone, a naturally occurring hormone); low potassium levels; and in patients with edema (fluid retention) caused by various conditions, including heart, liver, or kidney disease. Spironolactone is also used alone or with other medications to treat high blood pressure. Spironolactone is in a class of medications called aldosterone receptor antagonists. It causes the kidneys to eliminate unneeded water and sodium from the body into the urine, but reduces the loss of potassium from the body.

How should this medication be used?

Spironolactone comes as a tablet to take by mouth. It usually is taken once a day in the morning or sometimes twice a day . Take spironolactone at around the same time(s) every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take spironolactone exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Your doctor may start you on a low dose of spironolactone and gradually increase your dose.

Spironolactone controls high blood pressure and hyperaldosteronism, but does not cure these conditions.. It may take about 2 weeks or longer before the full effect of spironolactone occurs. Continue to take spironolactone even if you feel well. Do not stop taking spironolactone without talking to your doctor.

Are there other uses for this medicine?

Spironolactone also is used in combination with other medicines to treat precocious puberty (a condition causing children to enter puberty too soon, resulting in the development of sexual characteristics in girls usually younger than 8 years of age and in boys usually younger than 9 years of age) or myasthenia gravis (MG, a disease in which the nerves do not function properly and patients may experience weakness; numbness; loss of muscle coordination; and problems with vision, speech, and bladder control). Spironolactone also may be used to treat certain female patients with abnormal facial hair. Talk to your doctor about the possible risks of using this medication for your condition.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

  • Aldactone®
Last Revised January 04, 2009
American Society of Health-System Pharmacists
This information being provided is copyrighted by the American Society of Health-System Pharmacists, Inc., ASHP, Bethesda, Maryland.
©2009. All Rights Reserved.
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