Kamagra is a brand of medication used primarily to treat erectile dysfunction (ED). It contains Sildenafil citrate as the active ingredient, which belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. Kamagra works by increasing blood flow to the penis during sexual stimulation, allowing men to achieve and maintain an erection. It helps relax blood vessels in the penis, which enhances the natural process of sexual stimulation.