Kamagra Oral Jelly is a medication used to treat erectile dysfunction (ED) in men. Kamagra oral jelly active ingredient of sildenafil citrate, which is the same active ingredient found in Viagra.Kamagra oral jelly works by increasing blood flow to the penis, which helps achieve and maintain an erection when sexually stimulated. It does this by inhibiting an enzyme called phosphodiesterase type 5 (PDE5), which regulates blood flow in the penis.