Cenforce 130 mg contains sildenafil, it does not normally produce an erection without sexual stimulation. Sildenafil works by enhancing the natural erectile response to sexual arousal; it does not increase sexual desire or automatically cause an erection. Cenforce 130 Mg , 130 mg is above the usual recommended maximum sildenafil dose of 100 mg for ED, so it should not be self-adjusted or taken simply because a lower dose seems ineffective. If an erection occurs and lasts more than 4 hours, seek emergency medical attention.