Table 1.

The two main classes of incretin-based antidiabetic drugs.

Classes	Approved forms	Mechanisms of action	Ref.
GLP-1RA	Exenatide (exendin-4), Albiglutide, liraglutide, lixisenatide, semaglutide, dulaglutide	Agonists of intrinsic incretins	[9, 15]
DPP-4i	Sitagliptin, saxagliptin, vildagliptin, linagliptin	Inhibit incretin inactivation	[24, 25]