Vidalista 20mg is used to treat erectile dysfunction in men. Since it is generic, the cost is usually lower than that of tadalafil. Because of its affordability, some people may find it more accessible. When a penile artery is stimulated sexually, it helps the blood vessels relax and fill with blood. This makes it easier to get and keep an erection. Both belong to the class of medications called inhibitors of phosphodiesterase type 5. PDE5 inhibitors are only effective in the presence of sexual stimulation because they rely on the spontaneous release of nitric oxide, which is only created during sexual arousal. When using any PDE5 inhibitor, avoid consuming alcohol in excess. Don't combine this with other ED drugs.