Sildenafil (Viagra) Protective Effects on Neuroinflammation: The Role of iNOS/NO System in an Inflammatory Demyelination Model. Raposo C, de Nunes A K S, de Luna R L A, da Araújo S M R, da Cruz-Höfling M A, Peixoto C A Mediators Inflamm. 2013; 2013:321460. Epub 2013 Jul 22. PMID: 23970812. Abstract CommentRecommendBookmarkWatch