Valsartan is not recommended to be taken twice a day. Valsartan is a type of antihypertensive drug that produces an antihypertensive effect within 2 hours of oral administration, reaches its peak effect in 4 to 6 hours, and the antihypertensive effect is maintained until more than 24 hours after taking the drug. Therefore, the recommended dose of this drug is 80mg or 160mg once a day. An overdose of this product may lead to significant hypotension, causing a decrease in the level of consciousness, circulatory failure, and even shock. Therefore, it is not recommended to take valsartan twice a day. Common adverse effects of taking this drug include arthralgia, weakness, nausea, and edema. Valsartan has an inhibitory effect on the renin-angiotensin-aldosterone system (RAAS), and should not be used in cases of renal artery stenosis, severe renal insufficiency, or pregnancy. Valsartan should be used under the guidance of a professional doctor, follow the dosage and frequency of taking the drug, do not adjust the drug dosage and time of taking the drug on your own to avoid poor control of blood pressure.