Vidalista 40 is for men who suffer from erectile dysfunction. It is a sexually transmitted disease that prevents a man from maintaining an erection. Tadalafil is the active ingredient in this medicine. It works in the treatment of erectile dysfunction in men by increasing blood flow to the penis area by relaxing the muscles in the penile blood vessels. Thus, you can have enjoyable sex using this pill. This medicine can only be taken by men above 18 years.