Drugs A - Z

Verapamil Hydrochloride Solution for injection

It affects the amount of calcium found in your heart and muscle cells

Generic Name: verapamil  |  Brand Name: Calan

Brand Names: Isoptin, Verelan, Isoptin SR, Calan SR, Calan, Verapamil Hydrochloride SR, Verelan PM, Verapamil Hydrochloride, Covera-HS

What is this medicine?

VERAPAMIL (ver AP a mil) is a calcium-channel blocker. It affects the amount of calcium found in your heart and muscle cells. This relaxes your blood vessels, which can reduce the amount of work the heart has to do. This medicine is used to treat an irregular heart beat or flutter.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:
  • heart or blood vessel disease
  • heart rhythm disturbances like sick sinus syndrome, ventricular arrhythmias, Wolff-Parkinson-White syndrome, or Lown-Ganong-Levine syndrome
  • kidney disease
  • liver disease
  • neuromuscular disease such as muscular dystrophy
  • slow or irregular heartbeat
  • an unusual or allergic reaction to verapamil, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding

How should I use this medicine?

This medicine is for injection into a vein. It is given by a health care professional in a hospital or clinic setting.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What if I miss a dose?

This does not apply.

What may interact with this medicine?

Do not take this medicine with any of the following:
  • cisapride
  • disopyramide
  • dofetilide
  • grapefruit juice
  • hawthorn
  • pimozide
  • red yeast rice

This medicine may also interact with the following medications:

  • barbiturates, like phenobarbital
  • cimetidine
  • cyclosporine
  • lithium
  • local anesthetics or general anesthetics
  • medicines for heart rhythm problems like amiodarone, digoxin, flecainide, procainamide, quinidine
  • medicines for blood pressure or heart problems
  • medicines for seizures like carbamazepine and phenytoin
  • rifampin, rifabutin or rifapentine
  • theophylline or aminophylline

What should I watch for while using this medicine?

Your condition will be monitored carefully while you are receiving this medicine.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells. Alcohol may interfere with the effect of this medicine. Avoid alcoholic drinks.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:
  • allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
  • breathing problems
  • fast, irregular heartbeat
  • feeling faint or lightheaded, falls
  • swelling of the legs or ankles

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • constipation
  • facial flushing
  • headache
  • nausea, vomiting
  • sexual dysfunction
  • weak or tired

Where should I keep my medicine?

This drug is given in a hospital or clinic and will not be stored at home.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.


Last Updated: September 14, 2009
Licensed from
The Healthline Site, its content, such as text, graphics, images, search results, HealthMaps, Trust Marks, and other material contained on the Healthline Site ("Content"), its services, and any information or material posted on the Healthline Site by third parties are provided for informational purposes only. None of the foregoing is a substitute for professional medical advice, examination, diagnosis, or treatment. Always seek the advice of a physician or other qualified healthcare provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on the Healthline Site. If you think you may have a medical emergency, call your doctor or 911 immediately. Please read the Terms of Service for more information regarding use of the Healthline Site.
Advertisement
Advertisement