How does Amlodipine primarily function in the body?

Amlodipine primarily functions in the body through vasodilation. It is a calcium channel blocker that specifically inhibits the influx of calcium ions into vascular smooth muscle and cardiac muscle. This action leads to the relaxation and dilation of blood vessels, which decreases peripheral resistance and lowers blood pressure. By widening the blood vessels, amlodipine effectively improves blood flow and reduces the workload on the heart. This mechanism is crucial in treating conditions such as hypertension and angina, where improved blood flow can alleviate symptoms and reduce the risk of cardiovascular events. The other options do not accurately describe the primary action of amlodipine. Increasing heart rate, managing electrolyte levels, and reducing blood viscosity are not direct effects of this medication.