Sildenafil pulmonary arterial hypertension patients are able to take it seven times a week as prescribed by their doctor, and erectile dysfunction’s are used as needed to avoid adverse reactions. Sildenafil is a drug that treats erectile dysfunction and pulmonary hypertension in men. People with pulmonary arterial hypertension can use it for a long time according to the doctor’s prescription because they want to stabilize their condition, but long-term use for people with erectile dysfunction will increase the chances of adverse reactions, so try to use it as needed, and not use it too much to avoid increasing the chances of adverse reactions. Excessive use may cause flushing, low blood pressure, dizziness, vomiting, abdominal pain, diarrhea and other adverse reactions, and in severe cases, loss of hearing, blindness and other conditions, so should not be used too much. The drug is prohibited for people who are using or have recently used nitrates or guanylate cyclase stimulators and people who are allergic to sildenafil. The drug should be applied under medical supervision.