High Blood Pressure Medication, medication

Hydrochlorothiazide is a thiazide diuretic, you will often see it abbreviated as HCTZ or HCT.  HCTZ causes the kidneys to  excrete more water and sodium.  That decreases the amount of fluid in the body, leading to reduced blood pressure.

Hydrochlorothiazide is used for swelling(excess fluid) in the body and to lower blood pressure.  Your prescriber may use it for other conditions as well.


HCTZ Side Effects

Most common side effects include: dry mouth, nausea, muscle cramps, vomiting, low blood pressure upon standing, anemia, weakness, dizziness, high blood sugar, increased sensitivity to sunlight, rash and blurred vision.

Always contact your Doctor of Pharmacist if you believe you are having side effects from your mediation.


Capsules are available in 12.5mg and tablets are produced in 25mg and 50mg.

Adult doses vary from 12.5mg to 100mg daily.

HCT Combinations

Hydrochlorothiazide is commonly combined with other blood pressure lowering medications.  Some of the medications it is combined with are:  Amiloride, Benazepril, Bisoprolol, Captopril, Enalapril,  Eprosartan, Hydralazine, Irbesartan, Lisinopril, Losartan, Methyldopa, Metoprolol, Metoprolol Tartrate, Moexipril, Omesartan, Propranolol, Triamterene and Quinapril.

How to take Hydrochlorothiazide

Always keep in mind this is a diuretic, meaning it going to get rid of extra water in the body.  Taking it in the morning is best, and be near a restroom.

If you experience stomach upset it is fine to take food or milk with this medication.

Always remember this medication can make you more sensitive to sunlight.  Limit your sun exposure and wear sunscreen if you are in sunlight for more than a few minutes.

Caution should be used with this medication if you also have cirrhosis, gout, electrolyte imbalances, and diabetes.

Simple Diet and lifestyle changes can have a tremendous effect on lowering blood pressure.  I’ve seen people get off their blood pressure medications.  Be sure to discuss these changes with your health care provider if want to reduce the need for medication.

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The pharmaceutical information on this site is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes. This information is not intended to be patient education and should not be used as a substitute for professional diagnosis and treatment.
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