The most common side effects of Bystolic are: headache, tiredness, lightheadedness, and upset stomach. Severe Side Effects of Bystolic. You should tell your doctor right away if you experience any. Inderal (propranolol) is a beta-blocker. Beta-blockers affect the heart and circulation (blood flow through arteries and veins). Inderal is used to treat tremors, angina (chest pain), hypertension (high blood pressure), heart rhythm disorders, and other heart or circulatory conditions. Pictures of Inderal (Propranolol), drug imprint information, side effects for the patient. 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. Learn about Inderal (Propranolol) may treat, uses, dosage, side effects, drug interactions, warnings, patient labeling, reviews, and related medications. SIDE EFFECTS: You may experience dizziness, lightheadedness, drowsiness, and blurred vision as your body adjusts to the medication. Use caution engaging in activities requiring alertness. Maxalt side effects. Maxalt dosage. The Largest Canadian Mail Order Pharmacy. 24/7 customer support service. The best lowest prices for all drugs. Fast delivery by courier or airmail. Our drug store presents high quality pills. Along with its needed effects, propranolol (the active ingredient contained in Inderal) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. 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. Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.