Actilis contains Tadalafil, which is a PDE5 enzyme inhibitor drug. This drug acts on the root cause of male impotence by rectifying blood flow. Actilis inhibits the PDE5 enzyme that degrades a vasodilator called cGMP. As the level of cGMP increases in the body, it results in the relaxation of smooth muscles, and nitric oxide helps to dilate the blood vessels. It results in higher blood flow to the phallus, which makes it erect. However, sexual stimulation is essential to attain an erection. Within 30 to 60 minutes, This drug rapidly shows results and offers long-lasting effect.