Januvia 100mg is a prescription medication containing sitagliptin, manufactured by MSD. Each pack contains 28 tablets. It belongs to a class of drugs called DPP-4 inhibitors and is used to help control blood sugar levels in adults with type 2 diabetes mellitus, alongside diet and exercise. Januvia works by increasing the levels of incretin hormones in the body. These hormones help regulate blood sugar by increasing insulin release when blood sugar levels are high and decreasing glucagon production. The medication should be taken once daily as prescribed by your healthcare provider. The distinctive white packaging features the Januvia logo in blue with the MSD branding. This medication requires a prescription and should be used under medical supervision.