Wm Wrigley Jr Co has received a patent to deliver Viagra in chewing gum...

The Chicago-based group has received a patent for chewing gum formulations and methods of use to deliver the main ingredient in Viagra, sildenafil citrate. Pfizer, the world's largest drug company, has a patent on Viagra, the well-known Pfizer male impotence drug, that lasts until 2011. In US patent 6,531,114, Wrigley claims "a method for treating erectile dysfunction in an individual comprising the steps of providing a chewing gum composition that includes a therapeutically effective amount of sildenafil citrate in the chewing gum composition". Full Story...