Tadarise 40 mg is an oral medication used to treat Erectile difficulties in men. The active ingredient in Tadarise is tadalafil, a well-known phosphodiesterase type 5 (PDE5) inhibitor. PDE5 inhibitors work by blocking the enzyme that causes the blood vessels in the penis to constrict. By inhibiting PDE5, tadalafil helps relax the smooth muscles in the blood vessels, thereby increasing blood flow to the penis. This improved blood flow allows for the ability to achieve and maintain an erection during sexual activity.