Propranolol is used alone or together with other medicines to treat high blood pressure (hypertension). High blood pressure adds to the workload of the heart and arteries. If it continues for a long time, the heart and arteries may not function properly. Propranolol is generally safe to take for a long time. If you're taking it for a heart condition, or to prevent migraines, it works best when you take it long term. If you're taking it for anxiety, there do not seem to be any lasting harmful effects if you take it for several months or years. Propranolol is not inherently bad for you. It’s been used safely since the 1960s for conditions like high blood pressure, irregular heart rhythms, migraines, and anxiety symptoms. But it does carry real risks for certain people, and it can cause problems if used incorrectly or stopped suddenly. Propranolol helps control your condition but will not cure it. Continue to take propranolol even if you feel well. Do not stop taking propranolol without talking to your doctor. If you suddenly stop taking propranolol, you may experience serious heart problems. Propranolol works by blocking beta-adrenergic receptors in the heart, blood vessels, and kidneys, which decreases heart rate and force of heart contractions, and lowers blood pressure. This reduces the heart's oxygen demand and helps control various cardiovascular conditions. Propranolol tablets are a beta-blocker that treats high blood pressure, tremors and atrial fibrillation. It can also prevent migraine headaches. Easy-to-read patient tips for propranolol covering how it works, benefits, risks, and best practices. Find out how propranolol treats heart problems and helps with symptoms of anxiety and migraines, and how to take it. NHS medicines information on propranolol – what it's used for, side effects, dosage and who can take it. Find patient medical information for Propranolol (Inderal LA, Innopran XL, others) on WebMD including its uses, side effects and safety, interactions, pictures, warnings, and user ratings Learn how propranolol works for anxiety, what symptoms it helps, risks to watch, and when it may or may not be appropriate.