I probably should have said more.
I am 61 years old, and I've seen medicine's approach to cholesterol change over the years. First, all cholesterol was considered bad. Then only LDL cholesterol was considered bad. The approach they have taken towards it is to prescribe medications that lower LDL cholesterol, but perhaps LDL cholesterol is just a symptom of a deeper pathology, and lowering it doesn't solve your problem. I made a decision years ago that if I got high LDL cholesterol (it is now slightly high), that I would try to treat it with diet and exercise instead of medications.
As for Januvia, it stimulates your pancreas to release more insulin, but there is some concern that it may cause your pancreas to "wear out" more quickly. It can also cause hypos.
It just seems to me that diabetes and high cholesterol are disparate enough problems that they should be treated separately (although they both should respond to improved diet and increased exercise).