What does the drug Inderal do?

Inderal is used to treat tremors, angina (chest pain), hypertension (high blood pressure), heart rhythm disorders, and other heart or circulatory conditions. It is also used to treat or prevent heart attack, and to reduce the severity and frequency of migraine headaches.

Inderal may also be used for other purposes.

Important information about Inderal
You should not use Inderal if you are allergic to propranolol, or if you have asthma or certain heart conditions, especially second or third degree heart block. Do not stop taking Inderal without first talking to your doctor. Stopping suddenly may make your condition worse.
If you need to have any type of surgery, you may need to temporarily stop using Inderal. Be sure the surgeon knows ahead of time that you are using Inderal.

Avoid drinking alcohol. It may increase your blood levels of Inderal.
Inderal is only part of a complete program of treatment for hypertension that may also include diet, exercise, and weight control. Follow your diet, medication, and exercise routines very closely if you are being treated for hypertension.

Hypertension often has no symptoms, so you may not even feel that you have high blood pressure. Continue using this medicine as directed, even if you feel well. You may need to use blood pressure medication for the rest of your life.