Inderal (generic: propranolol) is a prescription medication used to treat high blood pressure, irregular heart rhythms, angina (chest pain), pheochromocytoma, and certain types of tremor. It is also used to prevent migraine headaches and to improve survival after a heart attack.

Inderal belongs to a group of drugs called beta blockers. It works to decrease blood pressure, heart rate, and the workload of the heart by blocking beta receptors. The exact way it works for migraine prevention and tremor is unknown.

This medication comes in tablet form and in an extended-release capsule (Inderal LA). The regular tablet may be taken 2 to 4 times daily. The extended-release capsule is usually taken once daily. Inderal can be taken with or without food.

Common side effects include nausea, tiredness, and dizziness or lightheadedness. Do not drive or operate heavy machinery until you know how it affects you.

*Brand name Inderal tablets are no longer available. Generic versions are made available by several manufacturers.