A type 5 phosphodiesterase inhibitor with the GMP specificity of Fildena 200 Pills is present in the blood. This enzyme, which is prevalent in the penile region of males, contributes to erectile dysfunction: a selective PDE5 enzyme inhibitor, Vidalista 40. Nitrogen oxides are produced and cyclic GMP (cyclic guanosine monophosphate) levels increase when this enzyme is inhibited by 100 mg of sildenafil citrate. Nitric oxide levels rise, which improves blood flow in the penile arteries and causes a penile erection. In the foreseeable future, higher doses will lead to penile erections that are more productive.