Active Ingredient

Spironolactone

Spironolactone is a medication commonly used to treat conditions that involve fluid retention and hormonal imbalances. It is often prescribed when the body needs to eliminate excess water while retaining potassium.

This medication can be helpful in managing certain heart, liver, and skin conditions. It is important to use it under medical supervision.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Spironolactone Brands

Aldactone

Strengths 25mg, 50 mg, 100mg

Spironolactone Uses

Spironolactone is used for various health conditions related to fluid retention and hormonal imbalance.

Heart failure management
High blood pressure control
Edema (fluid retention) due to liver or kidney disease
Polycystic ovary syndrome (PCOS)
Hormonal acne treatment

How Spironolactone Works

Spironolactone works by blocking the effects of a hormone called aldosterone. This helps the body get rid of excess water and sodium while retaining potassium.

By reducing fluid buildup, it can help lower blood pressure and decrease the workload on the heart.

In conditions like acne, it may reduce the effects of androgens, hormones that can contribute to skin issues.

Common side effects of Spironolactone

Not everyone experiences side effects from spironolactone, and many side effects are mild and temporary.

Dizziness
Headache
Stomach upset
Breast tenderness
Increased urination
Fatigue
Menstrual irregularities

If you experience serious or persistent symptoms, contact your doctor.

Monitor your blood pressure regularly to ensure it’s within a safe range.
Avoid consuming excessive amounts of potassium-rich foods or supplements.
Limit alcohol intake while taking this medication.
Inform your doctor of any other medications you are taking to avoid interactions.
Do not use spironolactone if you have severe kidney problems without consulting a healthcare professional.

Always consult your doctor for personalized medical advice.

Frequently Asked Questions

How long does it take for spironolactone to work?

Spironolactone may take a few days to several weeks to show noticeable effects, depending on the condition being treated.

Can spironolactone affect potassium levels?

Yes, spironolactone can increase potassium levels in the blood, so it’s important to monitor these levels regularly.

Is spironolactone safe for long-term use?

Spironolactone can be used long-term under medical supervision, but regular monitoring is important to ensure safety.

Can I take spironolactone with other medications?

Spironolactone can interact with certain medications. Always inform your doctor about all medications you are taking.

What should I do if I miss a dose of spironolactone?

If you miss a dose, take it as soon as you remember, unless it’s almost time for your next dose. Do not double up doses.