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Verapamil

Drug Class: Commonly Known As: Category:
Calcium Channel Blockers (Calcium Antagonists) Isoptin Adult

Verapamil - Side Effects, Precautions, and Contraindications

What side effects can Verapamil cause?

​Leg swelling, headache and constipation (difficulties in passing stools) are some common side effects of this medicine. You may also experience dizziness and lightheadedness on getting up from a sitting or sleeping position. This medicine may decrease your heart rate

The symptoms of a drug allergy include one or more of the following: 

  • Swollen face/eyes/lips
  • Difficulty in breathing
  • Itchy skin rashes over your whole body

If you experience any of these symptoms, you should stop your medicine immediately and see your doctor.

Very rarely, this medicine can injure or damage the liver. A liver injury may recover on its own. However in some cases, it can cause serious liver damage. Stop this medicine and see a doctor immediately if you notice dark coloured urine or light coloured stools, or if you experience nausea, vomiting, loss of appetite, stomach pain or yellowing of your eyes or skin. This side effect has a very low chance of occurring. Most patients take this medicine with no problems. Check with your doctor or pharmacist if you have any concerns regarding your medicines.

Before taking Verapamil, what precautions must I follow?

If you are pregnant or planning to get pregnant, you should inform your healthcare provider.  

What food or medicine must I avoid when I take Verapamil?

​Avoid taking grapefruit when you are taking this medicine as grapefruit may interact with your medicine and increase the risk of side effects.

This medicine can cause the heart rate to be slower and should be used with caution with other medicines that slow the heart rate e.g. digoxin, beta blockers and amiodarone. If you are taking these medicines together, make sure you go back to your doctor for regular check-ups.

There may be several other medicines that affect the level of this medicine in your body. Please see your doctor or pharmacist before using any other medicines, including over-the-counter medicines, vitamins, herbal products and other traditional medicines. Please make sure that the doctor who treats you knows that you are on this medicine

Verapamil - Additional Information

  • Updated on Wednesday, May 8, 2019
  • Article contributed by PSS National Medication Information Workgroup PSS National Medication Information Workgroup

    The information provided is not intended as medical advice. Terms of use. Information provided by SingHealth

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