What should I avoid while taking diltiazem?
Diltiazem can cause side effects that may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be awake and alert. Do not drink alcohol while taking diltiazem. Grapefruit and grapefruit juice may interact with diltiazem and lead to potentially dangerous side effects. Discuss the use of grapefruit products with your doctor. Do not increase or decrease the amount of grapefruit products in your diet without first talking to your doctor.