Discharge Instructions: Taking Calcium Channel Blockers

Your health care provider prescribed a medicine called a calcium channel blocker for you. This type of medicine can treat high blood pressure and fix abnormal heart rhythms. It also can relieve a type of chest pain called angina.

Medicine you take

The name of my calcium channel blocker is  _____________________

Home care

  • Follow the fact sheet that came with your medicine. It tells you when and how to take your medicine. Ask for a sheet if you didn’t get one.

  • Take this medicine exactly as directed, even if you feel fine.

  • If you miss a dose of this medicine, take it as soon as you remember—unless it’s almost time for your next dose. In that case, just wait and take your next dose at the normal time. Don’t take a double dose. If you aren't sure what to do, call your health care provider or your pharmacist.

  • Don’t drive until you know how you will react to this medicine.

  • Tell your health care provider about any other medicines or herbal remedies you are using.

  • Be sure to give this medicine time to work. It may take several weeks to lower your blood pressure.

  • Learn to take your own pulse. Keep a record of your results. Ask your provider which pulse rates mean that you need medical attention.

  • Don’t eat grapefruit or drink grapefruit juice. These may interact with calcium channel blockers.

  • Ask your provider how much exercise and activity is safe.

  • See your provider regularly while taking this medicine.

Possible side effects

Tell your health care provider if you have any of these side effects. Don’t stop taking the medicine unless your provider tells you to. Mild side effects include:

  • Sore, bleeding gums.

  • Mild headache.

  • Dizziness or lightheadedness.

  • Flushing.

  • Nausea.

  • Leg swelling.

When to get medical advice

Contact your health care provider right away if you have any of the following:

  • Severe headache

  • Coughing

  • Skin rash

  • Swollen ankles, feet, or lower legs

  • Constipation

Call 911

Call 911 if any of the following occur:

  • Severe dizziness or fainting

  • Breathing problems or wheezing

  • Chest pain or tightness

  • Irregular, fast, or pounding heartbeat

  • Slow, weak pulse

© 2000-2025 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
© Copyright StayWell. All Rights Reserved.