Medically reviewed by Jessica Swirble, PharmD
Last updated on 4/20/2024

Drug Information | Side Effects | Use & Dosage | Request a Prescription

• Brand Name: Aldactone, Carospir
  
• Generic Name: Spironolactone
  
• Uses: Hypertension, heart failure, edema, hormonal disorders
  
• Drug Class: Potassium-sparing diuretic, aldosterone antagonist
  
• Availability: Prescription only
  
• Generic Status: Yes
  
• Controlled Substance: No
  
  

Spironolactone is a medication classified as an aldosterone antagonist. It is also classified as a potassium-sparing diuretic. It is used to treat conditions such as high blood pressure (hypertension), heart failure, edema (fluid retention), and certain hormonal imbalances.

Spironolactone is used to treat conditions such as:

• High blood pressure (hypertension)
  
• Heart failure
  
• Edema (fluid retention) caused by kidney and liver disease, and congestive heart failure
  
• Hyperaldosteronism (a hormonal disorder in which the adrenal glands make too much aldosterone hormone)
  
  

It may also be prescribed for other medical conditions as determined by your healthcare provider.

Spironolactone works by blocking the effects of aldosterone, a hormone that regulates salt and water balance in the body. By blocking aldosterone, spironolactone helps the kidneys remove excess fluid and sodium from the body while holding on to potassium.

Spironolactone is usually taken orally with or without food, as directed by your healthcare provider. It should be taken around the same time every day and should either always be taken with food or always without. The dosage and frequency of spironolactone depend on your condition and response to treatment.

Follow the prescribed dosage and schedule strictly. Do not stop taking spironolactone suddenly without consulting your healthcare provider, as it may cause a sudden increase in blood pressure or fluid retention.

The time it takes to feel the full effects of spironolactone can vary depending on the condition being treated. Some people may notice improvement in symptoms such as fluid retention or high blood pressure within a few days to weeks, while others may require longer-term treatment for chronic conditions.

Continue taking spironolactone as prescribed even if you do not immediately feel better. Talk to your healthcare provider if you have any concerns about your treatment.

While spironolactone is primarily used for hypertension, heart failure, and edema, healthcare providers may sometimes prescribe it off-label for other conditions, such as:

• Acne in females
  
• Excessive hair growth (hirsutism) in females
  
  

Discuss any alternative uses of spironolactone with your healthcare provider.

Spironolactone is available in the following dosage forms:

• Oral tablets: Available in various strengths (e.g., 25mg, 50mg, 100mg)
  
• Oral suspension
  
  

Generic versions of spironolactone are available under various brand names.

Spironolactone is a prescription medication. You will need a valid prescription from a licensed healthcare provider to obtain this medication.