At present, antihypertensive drugs are divided into five categories: diuretics, beta receptor antagonists, calcium channel blockers, angiotensin converting enzyme inhibitors, and angiotensin II receptor antagonists. Blood pressure reduction needs to be individualized, that is, according to the specific situation of the patient, the effectiveness and tolerance of the drug, as well as the economic conditions and personal wishes of the patient, choose a suitable blood pressure drug for the patient. Hypertension patients can't buy drugs at will. They need to go to the hospital for a comprehensive physical examination. Doctors will choose suitable drugs according to the patients' conditions. If the effect of single drug treatment is not good, they may also need combined drugs.