Amlodipine tablets are effective in 1-2 hours, with blood levels peaking in 6-12 hours for maximum antihypertensive effect and complete metabolism in 35-50 hours. Amlodipine is a long-acting antihypertensive drug with a slow onset but long duration of action, and is the first-line drug for the treatment of patients with essential hypertension. The drug is well absorbed orally, is not affected by eating, and is generally well tolerated by the population. Patients are recommended to use the smallest dose for the first time, and the maximum antihypertensive effect is usually achieved in 6-12 hours. If the patient is not satisfied with the effect, the dose can be adjusted in 7-14 days, such as increasing or decreasing the dose. In conclusion, this class of antihypertensive drugs is suitable for people with hypertension with angina pectoris, relatively safe for pregnant women, and is a relatively widely used drug in clinical practice. However, they are prescription drugs and should be taken under the guidance of a doctor. In addition, patients should avoid eating grapefruit and drinking alcohol during the medication period to avoid increasing the side effects of the drug, and should not increase or decrease the dosage without authorization.