Metoprolol vs. Hydrochlorothiazide

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

Andre Stone | MD

Medically reviewed by Andre Stone | MD, University of Pittsburgh School of Medicine on September 8th, 2026.

Key Takeaways

  • Metoprolol is a beta-blocker that slows the heart and reduces its workload, while hydrochlorothiazide is a diuretic that lowers blood pressure by removing excess salt and water; they are often combined.

  • Metoprolol comes in immediate-release and extended-release forms. How often it is taken and whether the dose is changed gradually depend on the form prescribed and the condition being treated. Hydrochlorothiazide dosing is also individualized.

  • Do not stop metoprolol without talking with your prescriber; they may need to lower the dose gradually. Hydrochlorothiazide can affect electrolytes and has been linked to a small increased risk of certain skin cancers, so follow-up may be needed.

Metoprolol vs. Hydrochlorothiazide Drug Summary

Metoprolol

Metoprolol is a beta-1 selective beta-blocker used to treat high blood pressure, angina, and heart failure. The extended-release tablet is taken once a day and works by slowing the heart rate and reducing how hard the heart has to pump.

Hydrochlorothiazide

Hydrochlorothiazide is a thiazide diuretic used to treat high blood pressure and fluid retention from conditions like heart failure or cirrhosis. It is taken once a day as a tablet or capsule and works by helping the kidneys remove excess salt and water.

Metoprolol vs. Hydrochlorothiazide Side Effects

Metoprolol

Most common
Hypotension (up to 27.4%)
Bradycardia (up to 15.9%)
Tiredness (about 10%)
Dizziness (about 10%)

Hydrochlorothiazide

Most common
Hypotension (not specified)
Hypokalemia (dose-related)
Hyperuricemia (not specified)
Hyperglycemia (not specified)

Metoprolol vs. Hydrochlorothiazide Dosage

Metoprolol

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 12.5 mg once daily Weeks 1-2
Maximum dose 100 mg once daily Week 5 onward
Dose changes 3 increases Every 2 weeks

Hydrochlorothiazide

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 25 mg once daily At the start
Maximum dose 25 mg once daily Same as starting
Dose changes None Fixed dose

Metoprolol vs. Hydrochlorothiazide Indications

Metoprolol

Metoprolol is FDA-approved for high blood pressure, angina (chest pain), and stable heart failure. It is also used off-label for atrial fibrillation rate control, migraine prevention, and essential tremor.

  • Hypertension

  • Angina pectoris

  • Heart failure (NYHA Class II-IV)

  • Off-label: atrial fibrillation rate control

Hydrochlorothiazide

Hydrochlorothiazide is FDA-approved for high blood pressure and fluid retention from heart failure, cirrhosis, or kidney disease. It is also used off-label to help prevent calcium-containing kidney stones.

  • Hypertension

  • Edema from heart failure

  • Edema from cirrhosis or kidney disease

  • Off-label: prevention of kidney stones

Metoprolol vs. Hydrochlorothiazide Pros and Cons

Metoprolol

Metoprolol works well for patients who also have angina or heart failure, since it treats those conditions directly rather than just lowering blood pressure. It requires gradual dose changes and should never be stopped abruptly.

Pros

  • Also treats angina and heart failure

  • Once-daily extended-release dosing

  • Long track record of use since 1992

  • Low-cost generic beta-blocker

Cons

  • Cannot be stopped abruptly without tapering

  • Not safe with certain heart rhythm problems

  • Can cause fatigue or depression in some patients

  • Requires multi-week titration to reach full dose

Hydrochlorothiazide

Hydrochlorothiazide is a simple, well-established option for blood pressure and fluid retention, with a much shorter titration period than metoprolol. Long-term use carries some metabolic and skin cancer risks that need monitoring.

Pros

  • Fast titration, often just one dose change

  • Also treats fluid retention from several causes

  • One of the oldest, best-studied antihypertensives

  • Often combined with other blood pressure drugs

Cons

  • Can cause electrolyte imbalances like low potassium

  • Linked to increased skin cancer risk with long-term use

  • Not recommended during pregnancy

  • Can raise blood sugar and uric acid levels

Common Symptoms and Related Diseases You Can Explore

Explore a range of common symptoms the Doctronic Symptom Checker can help you understand.

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