Hydrochlorothiazide Diuretic Information

Part of a class of drugs known as diuretics, hydrochlorothiazide (HCTZ) is used for controlling high blood pressure and treating water retention. This diuretic (or "water pill") works by increasing the amount of salt and water that the kidneys remove from the blood. This extra salt and water is passed out through the urine. This action causes a decrease in blood volume, which helps to lower blood pressure and prevent water retention.
Hydrochlorothiazide comes in tablet and capsule form, and is available by prescription only. It is usually taken by mouth once a day. Some people may need to take this medication on a daily basis, while others only need to take it occasionally (such as when you experience water retention).
While most people tolerate hydrochlorothiazide well, side effects are possible. Some of the most common side effects that have been reported with this drug include:
  • Low blood potassium levels (hypokalemia) or other electrolyte imbalances
  • Dizziness
  • Upset stomach (nausea) or vomiting.
(Click Hydrochlorothiazide for more information about this diuretic, including details about its specific effects, dosing guidelines, potential drug interactions, and warnings.)
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