Amlodipine is a dihydropyridine calcium antagonist antihypertensive drug, has the role of the treatment of hypertension, coronary heart disease, hypertension combined with coronary heart disease and the treatment of hypertension in the elderly is more suitable. 1. Amlodipine can dilate blood vessels and can relieve coronary artery spasm, so it is more effective for people with hypertension combined with coronary artery disease, hypertension in the elderly is generally dominated by elevated systolic blood pressure, due to the vasodilator effect of amlodipine, so it is also very good for the patients with elevated systolic blood pressure to reduce blood pressure. 2. Common adverse reactions include flushing, panic, peripheral edema, and nausea, dizziness, etc. Adverse reactions in the eyes can be caused by acute myocardial infarction or angina pectoris. 3. Contraindications and precautions: people who are allergic to dihydropyridine calcium antagonists must be careful not to apply, because amlodipine may appear hypotension, so be careful when applying, a very small number of patients may have angina or acute myocardial infarction. Amlodipine though is more effective in lowering blood pressure in patients with simple systolic hypertension as well as hypertension with coronary artery disease. If medication is needed, it needs to be taken under the supervision of a doctor.