Serious side effects are very rare in people taking amlodipine. Chest pain might get worse in some people with very blocked arteries. They may even have a heart attack. This might happen when the dose of amlodipine is increased. Less serious side effects with amlodipine are also rare. But they may cause people to stop taking their medicine.

Some that have been reported include:

  • an abnormal heart beat
  • chest pain
  • shortness of breath
  • low blood pressure
  • very low potassium levels

These occurred in less than 1 of out of 100 people. Still, it is important to report any and all new symptoms to your doctor. Regular check-ups and blood tests help your doctor check for possible side effects, too. This is especially true when you first start or increase your dose of amlodipine.

Some experts think there may be a higher risk of breast cancer in people taking calcium channel blockers, like amlodipine. But they agree that more study is needed to know for sure.