is headsches a symptom of propranolol
Propranolol has a lot of possible side effects, and if they happen they can be serious. Stop taking propranolol and go to a doctor or hospital straight away if you get any of the following symptoms: 1  slow heartbeat and low blood pressure causing dizziness, light-headedness, fainting or blurred eyesight. Propranolol blocks the effects of the chemicals noradrenaline and adrenaline in the body. 2  These chemicals affect the heart, making it race and increasing your blood pressure. 3  Beta blockers therefore make the heart slow down and reduce shaking.