Recommended dosage For the treatment of performance anxiety or stage fright, a single dose of 10–40 mg may be administered 20–30 minutes before the event. Propranolol hydrochloride is a stable, white, crystalline solid which is readily soluble in water and ethanol. Its molecular weight is 295.80. Inderal is available in tablet form in doses of 10, 20, 40, 60 and 80 milligrams (mg). It is also offered as Inderal LA, a long-acting or extended-release medicine. Propranolol is a prescription drug. It comes in these forms: oral tablet, oral extended-release capsule, oral solution, and injectable. Propranolol oral tablet is only available in a generic form. Indications, dose, contra-indications, side-effects, interactions, cautions, warnings and other safety information for PROPRANOLOL HYDROCHLORIDE. Propranolol Tablets official prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions, pharmacology and more. 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. By Erika August 13, 2015 at 6:59 pm. I’ve been taking propranolol (a beta blocker) for a few months now, to treat my migraines. Recently I’ve noticed, that I’ve been feeling irregular heartbeats and discomfort in my chest. Learn about Inderal (Propranolol) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications. Pictures of Inderal (Propranolol), drug imprint information, side effects for the patient.