Propranolol hydrochloride is a medication used to treat high blood pressure, irregular heart rhythms (arrhythmia), myocardial infarction (heart attack), and it is also used to prevent migraines. Propranolol slows down a person's heart rate and makes it easier for the heart to beat. Pictures of Inderal (Propranolol), drug imprint information, side effects for the patient. Propranolol hydrochloride is a stable, white, crystalline solid which is readily soluble in water and ethanol. Its molecular weight is 295.80. Inderal® (propranolol hydrochloride) Tablets. This product's label may have been revised after this insert was used in production. For further product information and current package insert, please visit or call our medical communications department toll-free at 1-888-383-1733 Propranolol is a beta-blocker. Beta-blockers affect the heart and circulation. Propranolol is used to treat tremors, angina (chest pain), hypertension (high blood pressure), heart rhythm disorders, and other heart or circulatory conditions. Specifies the medication propranolol (Inderal, Inderal LA, Innopran XL), a drug to treat high blood pressure, chest pain, and abnormally rapid heart rates, and prevent migraine headaches and certain types of tremors. Propranolol is prescribed to treat a number of different conditions. If you are unsure why you are taking it, speak with your doctor. The most common side-effects are feeling tired, cold hands and feet, disturbed sleep, and stomach upset. Learn about propranolol, a beta-blocker. This article looks at how the drug affects the body and the conditions that it can be used to help treat. Propranolol is a beta-blocker. Beta-blockers affect the heart and circulation (blood flow through arteries and veins). Propranolol is used to treat tremors, angina (chest pain), hypertension (high blood pressure), heart rhythm disorders, and other heart or circulatory conditions. Inderal (Propanolol) is used to treat high blood pressure, a beta blocker that works by changing the response to nerve impulses in the heart & other body parts.