Hypertensive medications may cause dry mouth, and antihypertensive medications may cause abnormal metabolism of water in the body. Commonly used antihypertensive drugs are mainly urinary agents, beta-blockers, angiotensin receptor antagonists, angiotensin-converting enzyme inhibitors, as well as calcium antagonists, etc., usually the adverse effects of rapid heartbeat, ankle edema, angioneurotic edema, renal insufficiency, decreased urine output, etc., which in turn affects the human body’s water metabolism function, and thus cause dry mouth. Hypertension patients should maintain good dietary habits and habits of daily life and work, to maintain a smooth mood, more outdoor exercise, in the use of antihypertensive drugs, according to their own actual situation in the doctor’s advice and guidance, reasonable selection, if the body appears to have other symptoms of discomfort, should be timely stopping medication to change the drug to avoid unauthorized abuse of drugs.