Kamagra tablets are used by men with erectile dysfunction or impotence. The common ingredient in this drug, sildenafil citrate, helps men obtain and maintain an erection by increasing blood flow to the penis during intercourse. This medicine is taken 30 to 60 minutes before your sexual period. The effect of this medicine remains in your body for 4-5 hours. This medicine should not be taken with alcohol. This medicine should be used only after consulting a doctor.