Health Guide
Drug Guide

Penbutolol (By mouth)

Penbutolol Sulfate (pen-BUE-toe-lol SUL-fate)

Treats high blood pressure. Lowering blood pressure reduces the risk of strokes and heart attacks. May be used alone or in combination with other medicines, including a diuretic or "water pill" such as hydrochlorothiazide (HCTZ). This medicine is a beta blocker.

Brand Name(s):


There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

You should not use this medicine if you have had an allergic reaction to penbutolol or to any similar medicines (such as atenolol, metoprolol, propranolol, Corgard®, Inderal®, Lopressor®, Toprol®, or Tenormin®), or if you have asthma or certain heart problems such as heart block or slow heartbeat.

How to Use This Medicine:


If a dose is missed:

How to Store and Dispose of This Medicine:

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

Warnings While Using This Medicine:

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

If you notice these less serious side effects, talk with your doctor:

If you notice other side effects that you think are caused by this medicine, tell your doctor

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088

Last Updated: 12/12/2016

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Thomson & A.D.A.M