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
Hydrochlorothiazide
Valsartan vs. Hydrochlorothiazide Dosage
Valsartan
Hydrochlorothiazide
| 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 |
| 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
| 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
| 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
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