This is called angina. It can also be used to prevent migraine headaches, pulmonary hypertension, or to treat Raynaud's disease.
Nifedipine blocks certain channels in blood vessels that cause relaxation.
This results in a lowering of blood pressure and an increased blood flow to the heart, resulting in less chest pain. Take with or without food. Take with food if this medicine causes an upset stomach. Avoid grapefruit and grapefruit juice within 2 hours of using medicine. Do not chew, break, or crush.