When you are suffering from the problem of impotence i.e. ED, Kamagra Oral Jelly is used as a solution. Sildenafil acts as the active ingredient in Kamagra Oral Jelly. Seek medical advice before taking Kamagra Jelly. Kamagra Jelly is taken 1 hour before intercourse. After taking it, its effect lasts for 4-5 hours.