Valsartan vs. Hydrochlorothiazide

See how Valsartan and Hydrochlorothiazide compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Valsartan blocks a hormone that tightens blood vessels, while hydrochlorothiazide works by helping the kidneys remove extra salt and water.

  • Both are taken by mouth once a day, and doctors often combine them for stronger blood pressure control than either drug alone.

  • Valsartan also treats heart failure and post-heart attack recovery, while hydrochlorothiazide also treats fluid buildup from several other conditions.

Valsartan vs. Hydrochlorothiazide Drug Summary

Valsartan

Valsartan is an angiotensin receptor blocker (ARB) approved for high blood pressure, heart failure, and improving survival after a heart attack. It is taken by mouth, usually once a day, and the dose is adjusted over a few weeks based on blood pressure response.

Hydrochlorothiazide

Hydrochlorothiazide is a thiazide diuretic approved for high blood pressure and for fluid retention (edema) caused by several underlying conditions. It is taken by mouth once a day, and it has been used for this purpose for more than 60 years.

Valsartan vs. Hydrochlorothiazide Side Effects

Valsartan

Most common
headache (up to 14%)
dizziness (up to 14%)
viral infection (up to 3%)
fatigue (up to 2%)

Hydrochlorothiazide

Most common
weakness (not specified)
hypotension (not specified)
hypokalemia (not specified)
hyperglycemia (not specified)

Valsartan vs. Hydrochlorothiazide Dosage

Valsartan

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 80 mg once daily At the start
Maximum dose Up to 320 mg daily If needed
Dose changes 2 increases As tolerated

Hydrochlorothiazide

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 25 mg once daily At the start
Maximum dose 25-100 mg once daily If needed
Dose changes 2 increases As tolerated

Valsartan vs. Hydrochlorothiazide Indications

Valsartan

Valsartan is FDA approved to lower blood pressure in adults and children six and older. It also has approvals for heart failure and for improving survival after a heart attack in people with reduced heart function.

  • High blood pressure in adults and children 6+

  • Heart failure (NYHA class II-IV)

  • To improve survival after a recent heart attack

  • Often paired with a diuretic for extra effect

Hydrochlorothiazide

Hydrochlorothiazide is FDA approved to lower blood pressure, either alone or alongside other blood pressure drugs. It is also approved for edema caused by heart failure, liver disease, kidney disease, or corticosteroid and estrogen therapy.

  • High blood pressure, alone or with other drugs

  • Edema from heart failure, cirrhosis, or kidney disease

  • Edema from corticosteroid or estrogen therapy

  • Off-label: prevention of calcium kidney stones

Valsartan vs. Hydrochlorothiazide Pros and Cons

Valsartan

Valsartan blocks the hormone that tightens blood vessels, so it does not cause the potassium loss or blood sugar shifts linked to diuretics. It carries FDA approvals beyond hypertension, including heart failure and post-heart attack care. As a newer drug class, it has decades less real-world safety history than hydrochlorothiazide.

Pros

  • Does not typically cause low potassium or blood sugar changes

  • Also approved for heart failure and post-heart attack care

  • Not linked to increased skin cancer risk with long-term use

  • Causes less frequent urination than a diuretic

Cons

  • Can raise blood potassium, so periodic blood tests are needed

  • Not established for treating fluid retention (edema) on its own

  • Fewer decades of real-world safety data than hydrochlorothiazide

Hydrochlorothiazide

Hydrochlorothiazide works by helping the kidneys flush out excess salt and water, and it has been used for hypertension and edema for more than 60 years. It does not raise potassium the way some blood pressure drugs can, though it can lower potassium and sodium with long-term use. Its long track record comes with a boxed warning for skin cancer risk at high cumulative doses.

Pros

  • Decades of real-world use as one of the oldest antihypertensives

  • Also approved to treat edema from several different conditions

  • Does not raise blood potassium, so no hyperkalemia risk

  • May help prevent calcium kidney stones (off-label use)

Cons

  • Increases urination frequency, especially soon after dosing

  • Can lower potassium and sodium, requiring blood test monitoring

  • Boxed warning for increased non-melanoma skin cancer risk

Common Symptoms and Related Diseases You Can Explore

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