I’m taking 1000 mg of Metaformin twice daily, have been now for a couple of years, but have never experienced what your husband is going through. My diabetes began when I was 49 and I will be 59 in June. It sounds to me like your husband has had allot of rapid weight loss, and what he is going through may not be due to the Metaformin but may be due to something else. I’m just guessing here, because what you have described requires blood tests, urine tests, and a through physical examination, which apparently his doctor doesn’t feel is necessary.
Again, I‘m just guessing, it seems like with your husband only being on pills for his diabetes, and not pills and insulin as I am, that his body is still producing a good quantity of insulin. Metaformin makes the body more insulin sensitive so that the insulin in the body can be better utilized. My doctor put me on insulin because my body was not producing much and he did not want the pills to deplete and wear down my pancreas. The pancreas is what produces insulin.
My best suggestion for your husband is to get a second opinion. I believe that anytime a person has a life threatening illness, which diabetes is, they should get a second opinion, which not only includes diagnosis but also a suggested treatment strategy. I went through about 5 different doctors over a period of months, when I initially got diabetes, before I found a doctor that I was comfortable with and a comfortable treatment strategy, because while all of them told me I had diabetes, some said I had type 1 while others said I had type 2, and all of them had different treatment strategies. My first two years as a diabetic was an incredible adjustment period, not only for my body but also for the type of treatment I was receiving. I was hospitalized for low blood sugar just months after my diagnosis, but now have adjusted and have had no further hospitalizations for my diabetes. Another important point is that your husband should attend diabetic education classes, usually given at most hospitals by a diabetic nurse, and includes a dietitian, etc. Call your local hospital and inquire about diabetic education classes. I attended a number of these classes, you can go with him, most are approved by the American Diabetic Association, and they have allot of information to offer diabetics.