In the same patient, which medication is a calcium channel blocker?

In the same patient, which medication is a calcium channel blocker?

• A. Metformin
• B. Amlodipine
• C. Ramipril
• D. Furosemide

Answer: (B)

Calcium channel blockers work by preventing calcium ions from entering cells in the heart and blood vessels through L-type calcium channels, which lowers intracellular calcium and causes relaxation of vascular smooth muscle. This leads to vasodilation and reduced blood pressure. Amlodipine is a dihydropyridine calcium channel blocker that mainly acts on arterial smooth muscle, producing vasodilation and a fall in blood pressure with relatively less effect on heart rate or conduction. The other drugs belong to different classes: metformin is an oral antidiabetic agent, ramipril is an ACE inhibitor that reduces angiotensin II formation, and furosemide is a loop diuretic that increases urine output. None of these are calcium channel blockers. So, the calcium channel blocker in this set is amlodipine.

Calcium channel blockers work by preventing calcium ions from entering cells in the heart and blood vessels through L-type calcium channels, which lowers intracellular calcium and causes relaxation of vascular smooth muscle. This leads to vasodilation and reduced blood pressure.

Amlodipine is a dihydropyridine calcium channel blocker that mainly acts on arterial smooth muscle, producing vasodilation and a fall in blood pressure with relatively less effect on heart rate or conduction.

The other drugs belong to different classes: metformin is an oral antidiabetic agent, ramipril is an ACE inhibitor that reduces angiotensin II formation, and furosemide is a loop diuretic that increases urine output. None of these are calcium channel blockers.

So, the calcium channel blocker in this set is amlodipine.