Blood Pressure Home > Oretic

Oretic is commonly prescribed to control high blood pressure and treat water retention. The diuretic works by increasing the amount of salt and water removed from the blood, which causes a decrease in blood volume and a drop in blood pressure. The medication comes in tablet and capsule form, and is typically taken once a day. Possible side effects include nausea, electrolyte imbalances, dizziness, or vomiting.

What Is Oretic?

Oretic® (hydrochlorothiazide) is a prescription medicine used to treat high blood pressure and fluid retention. It is part of a class of medicines known as diuretics.
Oretic is sold under a number of other brand names, including Esidrix®, HydroDIURIL®, and Microzide®. It is also available as a generic medicine. Oretic is sometimes referred to as just HCTZ or HCT.
This medication has not been approved for use in children.

Side Effects of Oretic

As with any medicine, side effects are possible with Oretic. However, not everyone who takes the drug will experience side effects. If side effects do occur, they are often minor, meaning that they require no treatment or are easily treated by you or your healthcare provider. Serious side effects are less common.
The most common side effects of Oretic seen in people taking it for high blood pressure include:
  • Low blood potassium levels (hypokalemia) or other electrolyte imbalances
  • Dizziness
  • Upset stomach (nausea) or vomiting.
(Click Side Effects of Hydrochlorothiazide to learn more, including potentially serious side effects to look out for.)
You can also read about other possible side effects by going to the following eMedTV articles:


Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
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