Prescribed diabetes medications included the following: metformin, 57.5% (n=417); insulin, 14.9% (n=108); secretagogues, 11.3% (n=82); DPP-4 inhibitors, 8.3% (n=60); sodium–glucose cotransporter-2 inhibitors, 7.9% (n=57); and GLP-1 inhibitors, 5.0% (n=36). This evidence concerns the gene DPP4 and diabetes mellitus.