What are beta-blockers used for?

What are beta-blockers used for?

• A. Used to block epinephrine and norepinephrine
• B. Used to treat allergies
• C. Used to treat infections
• D. Used to induce sleep

Answer: (A)

Beta-blockers work by blocking beta-adrenergic receptors, which are the targets for the stress hormones epinephrine (adrenaline) and norepinephrine (noradrenaline). When these hormones bind to their receptors, they increase heart rate, force of contraction, and blood pressure. By blocking these receptors, beta-blockers dampen that sympathetic effect, lowering heart rate, reducing blood pressure, and decreasing the heart’s workload. This makes them useful for treating cardiovascular conditions such as hypertension, angina, certain arrhythmias, and some forms of heart failure. They’re not used to treat allergies, infections, or to induce sleep.

Beta-blockers work by blocking beta-adrenergic receptors, which are the targets for the stress hormones epinephrine (adrenaline) and norepinephrine (noradrenaline). When these hormones bind to their receptors, they increase heart rate, force of contraction, and blood pressure. By blocking these receptors, beta-blockers dampen that sympathetic effect, lowering heart rate, reducing blood pressure, and decreasing the heart’s workload. This makes them useful for treating cardiovascular conditions such as hypertension, angina, certain arrhythmias, and some forms of heart failure. They’re not used to treat allergies, infections, or to induce sleep.