NOT KNOWN FACTUAL STATEMENTS ABOUT FAKE KAMAGRA

In vitro experiments have demonstrated that sildenafil is selective for phosphodiesterase-5 (PDE5) . Its effect is a lot more strong on PDE5 than on other known phosphodiesterases . In particular, There's a 10-times selectivity around PDE6 and that is involved with the phototransduction pathway in the retina .Nitric oxide then activates the enzyme