The main therapeutic ingredient in Kamagra 100 is sildenafil citrate, which is similar to Viagra. Sildenafil citrate relaxes muscles and blood vessels and will increase blood flow and relieve your erectile dysfunction. Get an additional 10% discount on all products on your first order. Kamagra 100 is one of the top rated drugs for the treatment of male impotence. sildenafil citrate helps solve major sexual problems.