비아그라에 대한 새로운 단계별 지도

For PAH: Sildenafil performs by soothing the muscles and opening up the blood vessels within your lungs. This decreases the blood pressure in the lungs. Sildenafil slows down the development of the disease. What's more, it would make you far more capable to workout.But In case you have an erection that lasts lengthier than four hours, talk to a doc