What is the primary function of a beta blocker?

The primary function of a beta blocker is to lower blood pressure. Beta blockers work by blocking the effects of adrenaline (epinephrine) on beta-adrenergic receptors, which are found in various tissues including the heart and blood vessels. By inhibiting these receptors, beta blockers decrease heart rate and the force of contraction, leading to reduced cardiac output. This reduction, in turn, results in lower blood pressure, making beta blockers an effective treatment for conditions such as hypertension, heart failure, and certain types of arrhythmias.

The ability of beta blockers to help manage blood pressure is a foundational aspect of their pharmacological profile, contributing to their widespread use in cardiovascular medicine. It should be noted that while they may also have secondary effects such as reducing heart rate and providing some level of anxiety relief, their primary role in clinical practice is centered around blood pressure management.