Vidalista is a medication primarily used to treat erectile dysfunction (ED) in men. It contains the active ingredient Tadalafil, which belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. This medication works by increasing blood flow to the penis during sexual stimulation.

Relaxation of Blood Vessels: When a man is sexually stimulated, the arteries in the penis relax and widen, allowing more blood to flow into the penis.

Blockage of PDE5: Tadalafil inhibits the action of an enzyme called phosphodiesterase type 5 (PDE5). This enzyme usually breaks down a substance called cyclic guanosine monophosphate (cGMP), which regulates blood flow in the penis. By blocking PDE5, Tadalafil helps to maintain higher levels of cGMP in the penis, promoting prolonged relaxation of the penile arteries and increased blood flow, which leads to an erection.

Erection Maintenance: With increased blood flow, the penis becomes engorged with blood, resulting in an erection. This effect lasts for the duration of sexual activity or stimulation.

It's important to note that Vidalista 20 mg doesn't cause an erection on its own; sexual stimulation is necessary for it to work. The medication helps men with erectile dysfunction achieve and maintain an erection by enhancing the natural process of penile erection.