Sitagliptin, sold under the brand names of Sita, SitaGlu, is an anti-diabetic drug that is used to treat type 2 diabetes. It is described as being less desirable in the United Kingdom than metformin or a sulfonylurea.
Metformin, marketed under the trade names Glucophage, Neophage, Neodipar and others, is the first-line treatment for type 2 diabetes, particularly in overweight people.