Silagra 25 mg medication is used for the treatment of erectile dysfunction and some other male sexual problem; it belongs to a group of medicines called pde5 inhibitors. Now you can buy Silagra 25 mg online. It contains Sildenafil as its main ingredient. Sildenafil improves blood flow to the genital organ for sexual activity., thus maintaining an erection.its can be taken about 1 hour before you plan to have sex and Its effect will last for about 3-4 hours.