Tadalis Soft Tab is a selective inhibitor of cyclic guanosine monophosphate-specific phosphodiesterase type 5 (PDE5). It helps the smooth muscles in the male reproductive system to relax, which effectively increases blood flow. Thus, allowing the male reproductive organ to become and stay harder for long time. It treats the impotence by stimulating the flow of blood to the male reproductive organ that was improper previously. It prop up the activity of enzyme cGMP that stimulates the blood flow to the male reproductive organ, which makes the male reproductive organ hard and it stays hard for the sufficient time. The arteries in the male reproductive organ get hard and block the blood supply out of it. Due to this, the men are able to keep the stiffness state of male reproductive organ for the ample period during the love-making encounter. The reason behind the long-lasting effect of this medication is that the drug is not utilized to its full extent during the first usage. Tadalis soft tabs is washed out of the body after 36 hours, so the effect is seen for 36 hours.