Specifically, it works by blocking the entry of calcium into the muscle cells of the heart and blood vessels, which leads to relaxation and widening of the blood vessels. This improves blood flow and reduces the workload on the heart. It is typically taken once daily in a tablet form. The usual starting dose for adults is 5mg, but a lower dose of 2.5mg may be prescribed for individuals who are elderly or have liver problems. The dose can be adjusted based on the individual's response and the severity of their condition.It is important to take this medicine as directed by a healthcare professional and not to stop taking it without consulting a doctor, even if symptoms improve.