Hydrochlorothiazide Tablets

What Hydrochlorothiazide Tablets Are

Hydrochlorothiazide is a thiazide diuretic tablet that we supply in two oral strengths, 12.5 mg and 25 mg. Clinicians prescribe it to treat hypertension and to relieve the fluid retention, or edema, that can accompany heart failure, liver disease, kidney disorders, or corticosteroid treatment. The tablet lowers blood pressure by reducing sodium and water reabsorption in the kidney's distal tubule, which decreases circulating fluid volume and, with continued use, helps blood vessels relax.

Hydrochlorothiazide is often used alone for mild hypertension or combined with other agents, such as an ACE inhibitor, when blood pressure needs additional control. Readers comparing options can review our Lisinopril listing, since the two medicines are frequently prescribed together.

Essential Facts

Hydrochlorothiazide tablets are usually taken once daily, in the morning, with or without food; taking the dose early in the day helps avoid nighttime urination. Diuretic activity generally begins within about two hours, peaks around four hours, and lasts six to 12 hours. The blood pressure response may become apparent over several days and can take three to four weeks to reach its full effect. For edema, a clinician may start with a higher daily dose and taper it once swelling improves.

Take each dose according to the prescribed schedule. If a dose is missed, take it when remembered unless it is nearly time for the next dose; do not take two doses together. Because dizziness or lightheadedness can occur, especially when treatment starts or the dose changes, rise slowly from a sitting or lying position.

Common side effects include increased urination, dizziness, low potassium, and mild gastrointestinal upset. Periodic checks of blood pressure, kidney function, and electrolytes, especially potassium and sodium, are a standard part of monitoring during longer-term use. Clinicians may also monitor blood glucose and uric acid when diabetes or gout is a concern.

Available Strengths and Pack Sizes

We list hydrochlorothiazide tablets in pill counts matched to each strength, so customers can choose a supply that fits their prescribed regimen without over-ordering.

The 12.5 mg tablet is commonly used as a starting dose for hypertension, while the 25 mg tablet may be selected when the prescribed daily dose calls for it. We ship both strengths from the same catalog, and customers can select one of the listed package quantities at checkout to match the supply their clinician has recommended. Readers who are comparing blood pressure treatments more broadly are welcome to browse our Blood Pressure category for related options.

Safety Notes and Ordering

Hydrochlorothiazide should not be used by patients with anuria and is contraindicated in patients with a known hypersensitivity to sulfonamide-derived drugs. It requires caution in people with diabetes because thiazides can raise blood sugar and affect insulin or oral antidiabetic dosing needs. It can interact with lithium, NSAIDs, corticosteroids, and other blood pressure medicines, so a full medication review is worthwhile before starting treatment. Store the tablets at room temperature, between 68°F and 77°F, protected from light and moisture.

Hydrochlorothiazide is classified as a prescription medicine in the United States, and product-specific labeling and approval details vary by manufacturer and National Drug Code. We do not require you to submit a prescription to place an order, so you can select the strength and pack size you need and complete checkout directly; our pharmacist team is available 24/7 by phone, chat, or email if you have questions before or after ordering.