Viagra was developed by Pfizer in 1989 which is another name of name sildenafil citrate with the original idea of treatment of angina. Later found to be effective for dysfunction (ED). Its mechanism involves inhibiting PDE5 to improve blood flow through the nitric oxide (NO)/ cGMP pathway. It gained FDA(Food and Drug Administration) approval in 1998 as a trusted solution for ED, with side effects that has benefited countless men globally.
Dunzendorfer, U. (2012) Sildenafil. Switzerland: Birkhäuser Basel.
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Dunzendorfer, U. (2012) Sildenafil. Switzerland: Birkhäuser Basel.
Dunzendorfer, U. (2012) Sildenafil. Switzerland: Birkhäuser Basel.
Dunzendorfer, U. (2012) Sildenafil. Switzerland: Birkhäuser Basel.