Researchers treating mice with Viagra have made an amazing discovery -- the drug potentially busts the unseemly fat around the abdomen besides lowering risk of other obesity related complications. Sildenafil -- better known as Viagra -- is used to treat erectile dysfunction (ED). This substance prevents degradation of cyclic guanosine mono-phosphate (cGMP) which then ensures blood supply for an erection. ‘We have been researching the effect of cGMP on fat cells for quite some time now. This is why sildenafil was a potentially interesting candidate for us’ says Alexander Pfeifer professor of pharmacology and toxicology at the University of Bonn who