Silagra 100 is a drug made from a drug called Sildenafil. Silagra 100 is an effective dose of Silagra. Silagra 100 is an oral medicine that you can take with 1 glass of water. You should choose to take this medicine within 1 hour of sex and this medicine will give you 4 to 6 hours of effectiveness. If you take this medicine regularly with full caution, this medicine will give you a chance to be happy with your partner.