I am type 2, 20 years; first 8 years controlled with diet and exercise, second 8 years controlled with oral hypoglycemics. For 4 years have been on insulin pens, short and long lasting along with the oral hypoglycemics (glucophage and Januvia. Read an article in November of 2018 on the side effects of Januvia--joint & muscle pain,AND worsening kidney function, which were discovered in studies done in 2013 and 2014. Januvia was fast-tracked by the FDA in 2006 with, in my opinion, limited research. I am 80 years old and my kidneys are starting to show signs of poor function, and I have had increasing joint and muscle pain over the years I was on it, which I attributed to "I'm just getting older". I was put on Januvia in 2012. Had I known of those side effects, I would not have taken that drug. Manufacturer of Januvia has been very vague about the FDA's approval under the conditions that they do post-approval studies. When I called them, they would not send me the studies they did post approval. I am not sure who did the studies in 2013 and 2014, but intend to find out and read them. Have an appt with Nephrologist on Monday Feb 4. All these years, my A1c has been under 7, except once--last one was 6.6. Am a retired RN. Was looking into the CGM's because I travel a lot and I thought it might be a better way to manage my diabetes. However, I don't like the idea that the readings are interstitial fluid, not blood and the results for interstitial as opposed to blood result in a lag time. So the readings you get with the CGM's are not as accurate in "real time" as the finger stick blood sample. I have pretty much decided that the CGM's are not for me at this time especially since the results can be inaccurate if you ingest tylenol or ASA. I think they are good for identifying trends more than calculating how much insulin to take.