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Dyazide is commonly prescribed for the treatment of high blood pressure and fluid retention. The medication is a diuretic, which means it increases the amount of salt and water that is removed from the body. This reduces blood volume, which helps decrease blood pressure. Dyazide comes in capsule form, and is typically taken once a day. Some common side effects include dizziness, low blood pressure, and nausea.

What Is Dyazide?

Dyazide® (triamterene-HCTZ) is a prescription medicine that is used as a diuretic for the treatment of high blood pressure and fluid retention. It is a combination of two diuretic medications: triamterene and hydrochlorothiazide (HCTZ).

Who Makes Dyazide?

It is made by GlaxoSmithKline. Generic Dyazide is made by several manufacturers.

What Is It Used For?

Some specific uses of Dyazide include:
(Click Dyazide Uses for more information, including possible off-label uses.)

How Does It Work?

Dyazide is a diuretic. These medicines are commonly referred to as "water pills." Dyazide contains two diuretics that work together to keep electrolyte levels in balance. Hydrochlorothiazide, while effective, often causes low potassium levels in the blood. On the other hand, triamterene is a "potassium-sparing" diuretic, meaning that it can actually increase potassium levels in the blood. When taken together, these medications balance each other out.
The medication works by increasing the amount of salt and water the kidneys remove from the blood. This extra salt and water is passed out through the urine. By doing this, Dyazide causes a decrease in blood volume. Because of this effect, the medication can lower blood pressure and also help with water retention.
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Last reviewed by: Kristi Monson, PharmD;
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