Calcium channel blockers

There are several different calcium channel blockers and your doctor will advise on which one is best for you. Calcium channel blockers include:

• amlodipine
• diltiazem
• felodipine
• nifedipine
• verapamil.

Here are some things to know when you're taking calcium channel blockers. Other things may be important as well, so ask your healthcare provider what you should know about.

Taking other medicines and supplements

Calcium channel blockers can interact with some medicines, herbal supplements and rongoā Māori, so check with your doctor or pharmacist before starting any new products.

You may need regular tests and checks

You are likely to have regular blood pressure and heart rate checks while taking calcium channel blockers. You're also likely to have regular blood tests to check your blood and kidney function.

Don’t stop taking your calcium channel blocker suddenly

If you think your medicine is not working for you, do not stop taking it suddenly as this can make you feel unwell and can cause chest pain. Talk to your doctor or nurse before stopping. It is usually best to stop taking your medicine slowly to avoid side effects.

Like all medicines, calcium channel blockers can cause side effects, although not everyone gets them. Often side effects improve as your body gets used to the new medicine. For most people who take calcium channel blockers, serious side effects are rare.

The most common side effects are dizziness, flushing, headache and ankle swelling. If you get any side effects, talk to your doctor as soon as possible. 

Did you know that you can report a side effect to a medicine to CARM (Centre for Adverse Reactions Monitoring)? Report a side effect to a product.(external link)