What is the primary use of beta-blockers?

The primary use of beta-blockers is to decrease heart rate. These medications work by blocking the effects of adrenaline on beta-adrenergic receptors, which are found in various tissues throughout the body, including the heart. By binding to these receptors, beta-blockers reduce the heart's workload, leading to a slower heart rate and helping to lower blood pressure. This is particularly beneficial in treating conditions such as hypertension, angina, heart failure, and certain arrhythmias, where reducing heart rate can improve the overall function and efficiency of the heart while also minimizing oxygen demand.

Beta-blockers are not used to increase blood pressure; in fact, they typically have the opposite effect. They do not alleviate asthma symptoms as a primary indication; rather, they can sometimes worsen asthma by causing bronchoconstriction, especially non-selective beta-blockers. Additionally, beta-blockers do not stimulate appetite; their role is focused on cardiovascular health rather than gastrointestinal functions.