In general, there is a risk of taking Viagra for hypertension and thus it is advisable for hypertensive patients not to take Viagra. Hypertension is a common chronic disease in life, which is highly prevalent in middle-aged and elderly people. After suffering from this disease, the patient’s body circulation arterial blood pressure is higher than normal, at this time the patient needs to take drugs for treatment under the guidance of a professional doctor to dilate blood vessels and lower blood pressure, common such as nitrate drugs. Viagra, or sildenafil, is a drug that treats men with erectile dysfunction by dilating blood vessels to achieve therapeutic purposes. If the patient suffers from high blood pressure, is taking nitrate drugs, and then take Viagra, easily lead to excessive expansion of blood vessels, which leads to a sudden drop in blood pressure, and in serious cases, even rupture of cerebral vessels, causing bleeding, when the patient’s life is at risk. If a patient has the need to take Viagra, he or she must be evaluated by a professional doctor to see if he or she can take it when the blood pressure remains stable, and must not take it blindly to avoid adverse consequences.