Merck’s Januvia (sitagliptin) and its metformin combination, Janumet, are important drugs for type 2 diabetes patients as well as for Merck’s bottom line. These drugs, which are DPP-4 inhibitors, account for more than $6 billion in sales for this drug giant. Given the growing incidence of obesity and type 2 diabetes in the world, this franchise is poised for continued growth.
