Amlodipine belongs to the calcium channel blocker, for the first line of long-acting antihypertensive drugs, it is recommended that patients take a daily starting dose of 5mg, the maximum daily dose of 10mg, the maximum effect of the drug should appear after four weeks of taking the drug, relatively speaking, this drug is relatively slow, the onset of effect of the time of about 1-4 days, the general use of the drug 7-8 days after the blood concentration can reach a steady state. It is possible to take this medication either before or after meals, because the drug itself is not affected by eating. Amlodipine is mainly used for the treatment of hypertension, but also for the treatment of chronic stable angina and variant angina.