Valsartan can be taken with tadalafil, but low blood pressure may occur. Stop sexual activity promptly if you experience dizziness or headache. Valsartan is an antihypertensive drug and is mainly used in the treatment of mild to moderate hypertension. Its adverse reactions include cough, abdominal pain, fatigue, etc. It is contraindicated for those who are allergic to this product and women during pregnancy. Tadalafil belongs to the drugs for the treatment of erectile dysfunction in men, which can relax the vascular smooth muscle and increase the blood flow to the penis. Adverse effects of this product include back pain, myalgia, dyspepsia, flushing, headache, etc. It is contraindicated in patients who are allergic to this product and in patients who are taking nitrate drugs. The combination of tadalafil and valsartan may increase the antihypertensive effect of valsartan and symptoms of hypotension, such as dizziness and headache. If significant discomfort occurs after use, discontinue sexual activity and consult a physician. It is recommended to use under the supervision of a physician.