Valsartan capsule is used for the treatment of essential hypertension. Valsartan capsule is an angiotensin II receptor antagonist, which is a long-acting antihypertensive drug commonly used clinically in the treatment of essential hypertension. Adverse reactions: taking this drug can produce headache, edema, diarrhea, migraine, increased transaminases, leukopenia and thrombocytopenia, hyperkalemia and other adverse reactions. Precautions: Correct hyponatremia and/or hypovolemia before starting treatment; monitor blood potassium when combined with potassium-preserving diuretics; monitor urea nitrogen, blood creatinine, and blood potassium in patients with renal insufficiency; use with caution in patients with biliary tract infarction. Contraindications: known hypersensitivity to the product is prohibited; pregnancy and lactating women are prohibited. Drugs for hypertensive patients should be taken under the guidance of a doctor, and if there is any discomfort, consult a doctor promptly.