The biggest controversy is whether Pfizer will spin off its established products unit, which sells generic drugs and branded medicines like Norvasc and Zoloft that have lost patent protection.
Generic drugmakers Geneva Pharmaceuticals, a unit of Novartis AG (nyse: NVS - news - people ), Teva Pharmaceutical Industries (nasdaq: TEVA - news - people ) and privately held Ranbaxy Laboratories had all sued to quash the Glaxo patents.