Male erectile dysfunction, also known as sexual impotence, is treated using the drug tadarise. Tadarise pills belongs to the group of medications called phosphodiesterase 5 (PDE5) inhibitors. When they become sexually excited, men with erectile dysfunction are unable to keep an erection or contract and enlarge their **. When a man experiences sexual stimulation, his body increases blood flow to his *, resulting in an erection. Stroking the **** stimulates blood flow, which helps sustain an erection by regulating enzymes.