Sitagliptin phosphate bụ dipeptidyl peptidase Ⅳ (DDP-4) klaasị inhibitor ọgwụ nke German Merck ụlọ ọrụ mepụtara ma buru ụzọ nweta nkwado US Food and Drug Administration maka ọgwụgwọ ụdị ọrịa shuga 2, bụ ọgwụ antidiabetic ọhụrụ, nwere ike imeziwanye ahụ nke ya. ike ibelata ọkwa glucose ọbara dị elu, yana mmụba dịtụ na-abawanye site na igbochi ọrụ nke enzyme a, gụnyere ọkwa glucagon-dị ka peptide 1 na insulinotropic peptide na-adabere na glucose, si otú ahụ na-akpali pancreas iji meziwanye mmepụta insulin ma kwụsị glucose. mmepụta na imeju, na n'ikpeazụ belata mmetụta ụlọ ọgwụ nke mkpokọta glucose ọbara.