Active Ingredient

Metolazone

Metolazone is a medication commonly used to help remove excess fluid from the body. It is often prescribed for conditions where fluid retention is a problem.

This drug helps in managing conditions like high blood pressure and certain heart issues by promoting the elimination of excess salt and water through urine.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Metolazone Brands

Zytanix

Strengths 2.5 mg

Metolazone Uses

Metolazone is primarily used to treat conditions associated with fluid retention and high blood pressure.

Edema due to heart failure
Edema associated with kidney disorders
Hypertension (high blood pressure)
Liver cirrhosis with fluid retention

How Metolazone Works

Metolazone works by affecting the kidneys to increase the removal of sodium and water from the body. This helps reduce fluid buildup and lower blood pressure.

As a thiazide-like diuretic, it helps in relaxing blood vessels, which further assists in reducing blood pressure.

Common side effects of Metolazone

While not everyone experiences side effects, some may occur and are often mild and temporary.

Dizziness
Headache
Nausea
Fatigue
Muscle cramps
Increased urination
Upset stomach

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

Frequently Asked Questions

What does Metolazone do?

Metolazone helps remove excess fluid from the body and lowers blood pressure by increasing urine production.

How long does it take for Metolazone to work?

Metolazone usually begins to work within a few hours, but the full effect on blood pressure may take longer.

Is Metolazone safe for long-term use?

Your doctor will determine the safety of long-term use based on your specific condition and health status.

Can I take Metolazone with other medications?

It’s important to inform your doctor about all medications you are taking to avoid potential interactions.

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

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.