Verapamil Side Effects

As with any medicine, Verapamil can cause side effects. Generally, Verapamil is tolerated well by most people, however certain people may not be able to safely use Verapamil because they have certain medical conditions.

The most common reported side effects of Verapamil are:

  • Heart failure (condition where heart can’t pump as well)
  • Low blood pressure
  • Increased liver enzymes
  • AV block (condition where heart impulses are delayed)
  • Change in heart rate
  • Constipation
  • Shortness of breath
  • Dizziness
  • Nausea
  • Headache
  • Rash
  • Swelling
  • Flushing
  • Fluid in the lungs
  • Fatigue

Verapamil and Verapamil SR are not recommended for people who have:

  • Severe heart abnormalities (such as left ventricular dysfunction)
  • Low blood pressure or poor heart function (cardiogenic shock)
  • Certain heart rhythm problems (sick sinus syndrome except in patients with a pacemaker)
  • Second- or third-degree AV block (condition where heart impulses are delayed except in patients with a pacemaker)
  • Rapid heart rate (atrial flutter or atrial fibrillation and an accessory bypass tract as in Wolff-Parkinson-White, Lown-Ganong-Levine syndromes)
  • Had an allergic reaction to Verapamil

If you have any of these conditions, you may need to have your dose adjusted or have special tests to safely use Verapamil.

Verapamil Side Effects

Side effects of Verapamil may change depending on the dose you take. The side effects listed in the table below were experienced by 2% or more of the patients in the Verapamil clinical trials (with Covera HS) for high blood pressure and angina.

Most Common Side Effects of Verapamil

Side Effect Placebo All Covera-HS doses studies
Constipation 2.7% 11.7%
Headache 7.3% 6.6%
Upper respiratory infection 4.6% 5.4%
Dizziness 2.7% 4.7%
Fatigue 3.8% 4.5%
Edema 3.1% 3.0%

 

Have you experienced side effects using Verapamil? You are encouraged to report your side effects of any prescription drugs to the FDA (Food and Drug Administration). If you would like to report your side effects while taking Verapamil, visit www.fda.gov/medwatch, or call 1-800-FDA-1088.

Written & reviewed by: Lisa Erwin R.Ph. CGP | Last review date: Dec 2010. Click the References Link below for a complete list of references.

Written & reviewed by: Lisa Erwin R.Ph. CGP | Last review date: Dec 2010.
View References