Pfizer Inc. Sues Novartis AG Over Vfend Antifungal Patents Published: Jan 07, 2011 (Reuters) - Pfizer Inc (PFE.N) has sued Novartis AG's (NOVN.VX) Sandoz unit, accusing it of infringing its U.S. patents related to the antifungal treatment Vfend. Related links Reuters This will open in a new window Email this Facebook Twitter LinkedIn Pinterest Reddit Back to news