What is Kamagra Oral Jelly, and how does it work? The ingredient in Kamagra Oral Jelly is sildenafil citrate. It is part of the PDE-5 vasodilators. These drugs work by dilation of the blood vessels, particularly in the genital areas. This allows for colossal blood flow to allow an erection. Kamagra Jelly is not an aphrodisiac. However, stimulation will be asked to achieve an erection.  ...