Sildenafil can be taken for high blood pressure, but it is recommended to take it as prescribed by the doctor. Sildenafil mainly treats pulmonary arterial hypertension and erectile dysfunction diseases, and it can make the vascular smooth muscle diastolic, however, taking the drug may cause headache, flushing, dizziness, nasal congestion and other adverse reactions. In addition, if you are allergic to its ingredients, you should be prohibited from taking the drug. If hypertensive people are under good blood pressure control, they can take sildenafil under doctor’s supervision, and it will not have much effect on their blood pressure. It is recommended that people with high blood pressure should ask their doctor’s advice before taking sildenafil before using the drug, so as not to produce adverse effects and add extra burden to the body.