One drug that belongs to the class of phosphodiesterase type 5 (PDE5) inhibitors is Vidalista 80. Tadalafil, its principal constituent, is mainly used to treat male erectile dysfunction (ED). A man with erectile dysfunction (ED) struggles to get or keep an erection that is hard enough for sexual activity.

Tadalafil helps men get and maintain an erection by boosting blood flow to the penis during sexual stimulation. By blocking the phosphodiesterase type 5 enzyme, which breaks down cyclic guanosine monophosphate (cGMP) in the penis, it does this. A chemical called cGMP relaxes and widens blood vessels, enabling blood to enter the penis and result in an erection.