Blood Pressure Home > Hydrochlorothiazide

Hydrochlorothiazide is used for the treatment of high blood pressure and fluid retention. It is a type of diuretic that works by increasing the amount of salt and water that the kidneys remove from the blood, which causes a decrease in blood volume. Hydrochlorothiazide comes in both capsule and tablet form and is available in a number of strengths. Potential side effects of the medication may include low blood potassium levels, dizziness, upset stomach, and vomiting.

What Is Hydrochlorothiazide?

Hydrochlorothiazide (HCTZ) is a prescription medicine that is used to treat high blood pressure and fluid retention. It is part of a class of medicines known as diuretics.
Hydrochlorothiazide is sold under a number of brand names, including Esidrix®, HydroDIURIL®, Microzide®, and Oretic®. It is also available as a generic. The medication is sometimes referred to as HCTZ or HCT for short.
It may be used in children and infants with high blood pressure or fluid retention, although it has not been thoroughly studied for this age group. Be sure to talk to your healthcare provider about the benefits and risks of using hydrochlorothiazide in children and infants.

Who Makes Hydrochlorothiazide?

Several manufacturers make brand-name hydrochlorothiazide. Generic hydrochlorothiazide is also made by multiple generic manufacturers.

What Is It Used For?

Specific uses of hydrochlorothiazide include:


(Click What Is Hydrochlorothiazide Used For? for more information, including possible off-label uses.)
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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