Learn about the side effects of propranolol, from common to rare, for consumers and healthcare professionals. Propranolol is used to treat high blood pressure, atrial fibrillation, tremor, and other conditions. Learn about side effects, warnings, dosage, and more. Learn how propranolol works for anxiety, what symptoms it helps, risks to watch, and when it may or may not be appropriate. 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 being investigated as a potential treatment for PTSD. [34][35][36] Propranolol works to inhibit the actions of norepinephrine (noradrenaline), a neurotransmitter that enhances memory consolidation. [citation needed] Propranolol is a prescription nonselective beta-blocker used to treat high blood pressure (hypertension), angina (chest pain), irregular heart rhythms, tremors, and to reduce the risk of complications after a heart attack. Propranolol is in a class of medications called beta blockers. It works by relaxing blood vessels and slowing heart rate to improve blood flow and decrease blood pressure. Overview: Propranolol is used for high blood pressure, chest pain, heart problems, and migraine prevention, among other uses. It works by slowing your heart rate and reducing how hard your heart. Propranolol tablets are a beta-blocker that treats high blood pressure, tremors and atrial fibrillation. It can also prevent migraine headaches. 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.