Overview PF-00489791 For The Treatment Of Raynaud's Status: Completed Trial end date: 2011-05-31 Target enrollment: Participant gender: Summary The investigators propose that once daily administration of PF-00489791, a phosphodiesterase inhibitor, will reduce vasospasm and improve symptoms and signs associated with Primary and Secondary Raynaud's Phenomenon. Phase: Phase 2 Details Lead Sponsor: PfizerTreatments: Phosphodiesterase 5 Inhibitors