Chlorosartan and chlorosartan potassium tablets belong to the same kind of drugs, there is no so-called “which one is better”, patients should follow the doctor’s instructions to use the drug. Chlorosartan, or chlorosartan potassium, is an angiotensin II receptor antagonist, which can inhibit the renin-angiotensin-aldosterone system, improve myocardial and vascular remodeling, and reduce urinary proteins to protect renal function, which is mainly used in the treatment of essential hypertension. Some patients may experience adverse reactions such as abdominal pain, fatigue, palpitations, nausea and headache during treatment with chlorosartan. This drug is well tolerated and the symptoms of adverse reactions are generally mild and transient, usually without the need to terminate treatment. Patients should take the drug in strict compliance with the dosage prescribed by the doctor and should not increase the dose of the drug without authorization, as this may cause hypotension and tachycardia. It is contraindicated in cases of hypersensitivity to any of the components of the product, moderate to severe renal insufficiency, hypotension, hyperkalemia and bilateral renal artery stenosis. Chlorosartan is a prescription drug, and patients are advised to use it under the guidance of a doctor, and not to blindly self-medicate to avoid serious effects.