Sildenafil acts as the active ingredient in Silagra 100 Mg pills. Silagra 100 is to be taken one hour before sex. The effect of indigestion which is taken remains for 5-6 hours. Before taking Silagra 100mg it is advisable to consult a doctor. Silagra 100 is a pill that is mostly used by men. Silagra 100 should be kept away from small children and pets. Sax is the best tablet.