The Lovento tablet is actively composed of Sildenafil Citrate, a potent PDE5 enzyme inhibitor drug. The mechanism of the PDE5 inhibitor is slightly complex. This drug stops the activity of the PDE5 enzyme and inhibits the degradation of the cyclic Guanosine Monophosphate (cGMP). It is a vasodilator. Later, the body secrets another vasodilator called nitric oxide. cGMP and nitric oxide together work to dilate arteries, relax the muscles, and boosts blood flow to the penile organ. The higher blood flow results in an erection when a man is sexually aroused.