I am now taking Trajenta 5 mg, once a day. After one blood work, my A1C was lowered by around 10% with no adverse effects on my other tests such as liver, kidney, etc. That is the good news. The bad news is that with my Prescription insurance coverage, my copay is still around $200 for a 90 day supply. That is steep! Considering that Metformin costs less that $5 for the same time period.
There are other medications such as Tranjueto which is a combination of Trajenta and Mertformin.
Since some of these medicines are new, its long term side-effects in controlling diabetes is still not clear. On the other hand, many of the generic diabetes pills have been in use for over 20 years with no major side-effects. Remember that side-effects differ from person to person.