The generic name of Viagra is sildenafil citrate, which can treat pulmonary arterial hypertension, but it is an over-the-counter medication and needs to be chosen in accordance with medical advice. Sildenafil citrate is a type 5 phosphodiesterase inhibitor, which is often used for the treatment of erectile dysfunction in clinical practice. However, due to the dilatation effect of the drug on arterial blood vessels, it also has a certain therapeutic effect on pulmonary arterial hypertension, and it can dilate the pulmonary arteries after using the drug to alleviate the pulmonary arterial hypertension, and it is a kind of targeting drug for the treatment of pulmonary arterial hypertension in clinical practice at present. In addition to sildenafil citrate, there are many other drugs for the treatment of pulmonary arterial hypertension, such as bosentan and anisentan. But pulmonary arterial hypertension can not simply rely on sildenafil citrate treatment should go to the hospital to find out the cause of the cause of the treatment, the patient must not self-medication.