Intravenous immunoglobulin (IVIG) is used in the treatment of a variety of autoimmune neurological disorders and is generally regarded as safe. We present a case series where IVIG causes transaminitis. The adverse effects are mostly due to the stabilizing agent used to prepare the IVIG (e.g., maltose in this series). While the adverse effects are usually self-limiting, physicians should be cautious in administering an IVIG preparation to these patients.