Question 44

Metoprolol is a beta-blocker.

Beta-blockers are a class of medications that reduce blood pressure and heart rate by blocking the effects of adrenaline on the body's beta receptors. Metoprolol specifically is a well-known beta-blocker used to treat hypertension and other heart conditions.

A) Lisinopril

Lisinopril is an ACE inhibitor, not a beta-blocker. It works by relaxing blood vessels to lower blood pressure, but it does not block beta receptors, which is the primary function of beta-blockers.

B) Metoprolol

Metoprolol is indeed a beta-blocker. It specifically targets beta-1 adrenergic receptors in the heart, reducing heart rate and the force of contraction, which ultimately lowers blood pressure and helps manage conditions such as heart failure and arrhythmias.

C) Amlodipine

Amlodipine is a calcium channel blocker, not a beta-blocker. It works by relaxing the muscles of the blood vessels to improve blood flow, but it does not have the mechanism of action that involves beta receptor inhibition.

D) Furosemide

Furosemide is a loop diuretic, which helps to eliminate excess fluid and sodium from the body. It is not classified as a beta-blocker and does not work on beta receptors, making it ineffective for the same purposes as beta-blockers.

Conclusion

Metoprolol is definitively the correct answer as it is the only option that belongs to the beta-blocker class of medications. All other options, including Lisinopril, Amlodipine, and Furosemide, serve different purposes and mechanisms of action, confirming that they do not qualify as beta-blockers.