The side effects of valsartan include elevated blood potassium, gastrointestinal discomfort, allergic reactions, liver and kidney function impairment. Valsartan belongs to the common western prescription drugs, the main indication is hypertension, clinical treatment process side effects are relatively few, the main side effects are the following. 1. Elevated blood potassium levels can occur in the process of taking the drug, and it is not recommended that patients take valsartan orally for a long time. 2. Valsartan can also lead to gastrointestinal reactions, such as nausea and vomiting, and some patients can manifest diarrhea or constipation. 3. A very small number of patients taking valsartan can lead to allergic reactions, such as urticaria, atopic dermatitis, angioneurotic edema and so on. 4. Valsartan can also cause damage to the liver and kidneys, and some patients may have elevated levels of aminotransferases and creatinine. Valsartan is contraindicated in people who are allergic to valsartan. Although the side effects of valsartan are small, it is important to pay attention to close monitoring in the process of taking the drug to prevent serious physical damage. Specific medication should be prescribed by a doctor.