Kamagra is used to treat erectile dysfunction in men. The active ingredient in Kamagra Pill is Sildenafil citrate, which works by inhibiting an enzyme responsible for the consistency of blood flow to the genital area of men. By suppressing the action of this enzyme, blood flow to the genital area is restored, which allows for an erection to occur. Sildenafil citrate has been proven effective not only for treating erectile dysfunction but also for pulmonary arterial hypertension.