The most common side effect of antihypertensive drugs is hypotension. Each antihypertensive drug is different and has different adverse reactions: 1. Calcium channel antagonists: also known as diphenhydramine, such as nifedipine, amlodipine, etc. Common side effects include gingival hyperplasia, ankle edema, reflex heart rate increase, constipation, dizziness, headache, etc.; 2. Priligy antihypertensive drugs: also known as ACEI class antihypertensive drugs, such as benazepril, Fosinopril, etc. Common side effects are persistent dry cough, hyperkalemia, sometimes can lead to creatinine elevation; 3, diuretic antihypertensive drugs: such as furosemide, more common side effects are weakness, hypokalemia, may also interfere with the blood sugar situation; 4, beta-blockers: that is, propranolol, metoprolol, bisoprolol, etc., the most common side effects are slowed heart rate, occasionally dry mouth, but also rhinitis, muscle aches and pains symptoms.