Amlodipine benzenesulfonate tablets usually take the drug about 1-2 hours to take effect, which itself belongs to the long-acting antihypertensive drugs, need to follow the doctor’s instructions. Amlodipine benzenesulfonate is a second-generation dihydropyridine calcium channel blocking drug with antihypertensive effect, commonly used in the treatment of hypertension. Patients take the drug about 1-2 hours after the onset of action, and in about 6-12 hours to reach the peak blood concentration, which can last for 24 hours, in the blood concentration to achieve a stable state, can be a smooth reduction in blood pressure. Adverse reactions:The more common side effects are headache, edema, fatigue, insomnia, heart, abdominal pain, flushing, panic and dizziness. Rare side effects are pruritus, rash, dyspnea and weakness, muscle cramps and dyspepsia. Contraindications:Contraindicated in patients who are hypersensitive to the product; contraindicated in patients with cardiogenic shock; contraindicated in patients with acute unstable angina; contraindicated in patients with previous myocardial infarction; contraindicated in severe aortic stenosis. Precautions:This product should not be used in the event of an attack of angina pectoris within 8 days after myocardial infarction. Sudden withdrawal of the drug may aggravate angina. The dose of this product should be reduced in patients with hepatic insufficiency. The drug should be discontinued if angina occurs after administration of the product. The above drugs need to be taken under the guidance of a doctor, do not take them on your own to avoid delays.