what is a beta-blocker
A Beta blocker is a prescription drug used to lower blood pressure and reduce heart rate. It counteracts the effects of adrenaline to beta receptors, which are located throughout the body including the nervous system and heart.Beta blockers relax the heart and allow it to beat slower, which reduces blood pressure.eta blockers are used for treating high blood pressure, heart failure, glaucoma, hyperthyroidism, chest pain (angina), migraine headaches, heart attacks, irregular heart rhythm (arrhythmia), certain types of tremors and generalized anxiety disorder.