Sahoo et al. ​[8]​ presented a 36-year-old woman with T1DM who developed recurrent episodes of psychosis following poor adherence to her insulin therapy. Lopes et al. ​[9] reported a case of an 80-year-old woman with delirium and psychotic symptoms associated with hyperglycemia from poorly controlled type 2 diabetes mellitus (T2DM). Here, INS is linked to psychotic disorder.