Sildenafil 20mg is a generic variation of an additional branded sildenafil from Pfizer called Revatio ® . Remember that Pfizer very first started checking sildenafil in the ’90s for high blood pressure and also ischemic heart disease. While they swiftly changed equipments to concentrate on ED, they continued testing sildenafil in various other setups. Greater than 300 million guys worldwide are anticipated to experience impotence by 2025. The study reported was funded and also supported by Pfizer Inc . The…