Sildenafil acts as the active ingredient in Kamagra oral jelly drug. Sildenafil acts as the active ingredient in Kamagra jelly. Kamagra jelly is taken some time before intercourse. After taking Kamagra Jelly, its effect lasts for 4-5 hours. Consult a doctor before taking Kamagra Jelly. Millions of people around the world are easily getting rid of their impotence problem through the use of Kamagra drug. Keep workers away from small children and pets.