Kamagra Jelly 100mg is a jelly that is sometimes used to treat erectile dysfunction in men. It contains the active ingredient sildenafil citrate, which is also the main ingredient of the well-known ED jelly Viagra. Sildenafil citrate is a type of phosphodiesterase type 5 inhibitor that helps improve blood flow to the penis, enabling a man to achieve and maintain an erection during sexual arousal. You take the jelly with a light meal.