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Why is Calan prescribed?

Verapamil is used to treat irregular heartbeats (arrhythmias) and high blood pressure. It relaxes your blood vessels so your heart does not have to pump as hard. It also increases the supply of blood and oxygen to the heart to control chest pain (angina). If taken regularly, verapamil controls chest pain, but it does not stop chest pain once it starts. Your doctor may give you a different medication to take when you have chest pain.

This medication is sometimes prescribed for other uses; ask your doctor or pharmacist for more information.

How should Calan be used?

Verapamil comes as a regular tablet and as an extended-release (long-acting) tablet and capsule to take by mouth. The regular tablet is usually taken three times a day. The extended-release tablet and capsule are usually taken one or two times a day and should be swallowed whole. Do not chew, divide, or crush the extended-release tablet or capsule. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take verapamil exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Verapamil controls arrhythmias, high blood pressure, and chest pain (angina) but does not cure them. Continue to take verapamil even if you feel well. Do not stop taking verapamil without talking to your doctor.

What are some Calan precautions?

Before taking verapamil,

  • tell your doctor and pharmacist if you are allergic to verapamil or any other drugs.
  • tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially aspirin, carbamazepine (Tegretol); cyclosporine (Neoral, Sandimmune); fentanyl (Duragesic); heart and blood pressure medications such as beta-blockers, digoxin (Lanoxin), disopyramide (Norpace), flecainide (Tambocor), quinidine (Quinaglute, Quinidex), diuretics ('water pills'), or any other blood pressure lowering medication; lithium (Eskalith, Lithobid); medications to treat depression; medications to treat glaucoma (increased pressure in the eye); phenobarbital; rifampin (Rifadin, Rimactane); theophylline (Theo-Dur); and vitamins.
  • tell your doctor if you have or have ever had heart, liver, or kidney disease, muscular dystrophy, or gastrointestinal obstruction (strictures).
  • tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking verapamil, call your doctor.
  • if you are having surgery, including dental surgery, tell your doctor or dentist that you are taking verapamil.
  • you should know that verapamil may increase the effects of alcohol and make them last longer.

What are some possible Calan side effects?

Verapamil may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

  • constipation
  • dizziness or lightheadedness
  • headache
  • upset stomach
  • heartburn
  • excessive tiredness
  • flushing (feeling of warmth)
  • slow heartbeat
  • vivid, unusual dreams

If you experience any of the following symptoms, call your doctor immediately:

  • swelling of the face, eyes, lips, tongue, arms, or legs
  • difficulty breathing or swallowing
  • fainting
  • rash
  • yellowing of the skin or eyes
  • fever
  • increase in frequency or severity of chest pain (angina)

Additional Information


40mg verapamil  Buy Calan 100 Tab - $57.00
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Buy Calan 100 TabGeneric 40mg $57.00 Add
100 TabGeneric 80mg $57.00 Add
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No current Rx required
Calan Pack Sizes Strength Price Cart
Buy Calan 28 TabletsGeneric 120mg $23.08 Add
Buy Calan 84 TabletsGeneric 40mg $23.08 Add
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Medicines have benefits and some have risks. Always read the label and use only as directed. If symptoms persist or you have side effects see your health professional.

Items with this symbol require a prescription be received by us before we can ship it to you. After checking out we will provide you with the information you need to send us your prescription.

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Calan Reviews

Overall rating:
  • 2017-11-02 01:20:08 EST
    I was put on this medication because my heart flutters and beats very rapidly sometimes. BP also fluctuates wildly, which makes me physically sick. Calan has not completely fixed the issue but it has made it better for sure, and maybe it'll continue to improve as I keep taking it. I have a coworker who took Calan for migraines for about 6 weeks until the Rx ran out. She never refilled it, but also never had another migraine... it's been 15 years now. Probably just a coincidence but who knows... :P
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