he incidence and prevalence of diabetes mellitus in the United States is increasing rapidly.1 Eleven unique drug classes have been approved by the US Food and Drug Administration for type 2 diabetes mellitus. 1 Incretin-based hypoglycemic agents, including the glucagon-like peptide 1 (GLP-1) agonists and the dipeptidyl peptidase-4 inhibitors, have recently received considerable press. The US Food and Drug Administration released a statement heightening provider awareness of potential adverse events after data linking these drugs to an increased risk for pancreatic cancer surfaced. 2 Despite these warnings, the American Association of Clinical Endocrinologists guidelines 3 recommend the use of incretin mimetic drugs early in the process of intensifying glycemic control.Incretin-based hypoglycemic agents have also been implicated in cases of hepatotoxic effects. 4,5 Identifying drug-induced liver injury (DILI) is challenging, because cases are rare and can have variable presentations, including hepatic steatosis, acute liver failure, hepatic necrosis, cholestatic hepatitis, and autoimmune hepatitis (AIH). 6 A drug's hepatotoxic potential is often recognized only after approval by the US Food and Drug Administration. 6 We present the first case, to our knowledge, of drug-induced marker-negative AIH associated with liraglutide (Victoza; Novo Nordisk), a GLP-1 agonist approved in 2010 for type 2 diabetes mellitus.
Report of a CaseA young Hispanic woman with a medical history of type 2 diabetes mellitus and vitiligo presented with nausea, emesis, and acute hepatitis of 10 days' duration. Other than switching drug therapy from exenatide, 10 μg twice daily, to liraglutide, 1.2 mg/d, 4 months before presentation, the patient reported no changes in medication use or use of herbal supplements or acetaminophen. For the last 3 years she had taken metformin hydrochloride, 500 mg twice daily, and used topical tacrolimus ointment, 0.1%, for her vitiligo. Her social history was unremarkable other than recent travel to the southern United States. Physical examination findings included mild scleral icterus but no evidence of advanced liver disease, abdominal tenderness, or altered mentation.