My endocrinologist had never heard of it, but it’s common on this forum. A person with IDDM can develop insulin resistance, same as NIDDM. While she’d never heard of it, my endocrinologist suggested metformin (Glucophage), and it worked.
It’s a problem: using Google to find papers on an IDDM developing insulin resistance turns up almost nothing except this forum, no papers, no research, so endocrinologists have never heard about it. But (of course) if elderly Type 1 diabetics with a family history of Type 2 get older (and I do not approve of the only alternative) there is no theoretical reason why they cannot develop insulin resistance. Why there isn’t more of this in the literature might come down to the fact that there weren’t very many elderly diabetics until recently: when I was a boy, I read that Type 1 diabetics rarely lived to be 60. There were no meters, and the medical advice was to keep the urine test barely green, just a tiny amount of sugar in the urine, meaning a blood sugar of about 180. If no sugar in the urine, one might be hypo (no way to tell), and a hypo can kill much quicker than a sugar of 180, so that’s what the medical books recommended until the '80s. Of course, 180 kills, but more slowly than a severe hypo.
In any case if one is younger than 60, Type 2 is rare. There are, of course, 3 things that are contributing factors to Type 2: heredity, weight, and age. Only one of these (weight) can be controlled by a Type 2. And one of them (age) seldom happened to Type 1 diabetics, so I have been unable to find a single medical research paper about Type 1 diabetics with insulin resistance, even though (if one follows this forum) it’s now quite common.
So the only solution is to find an endocrinologist who will prescribe metformin. (Since developing insulin resistance, I’ve done a LOT of reading, and the textbooks all say metformin; the drug companies that make newer, more expensive medications for Type 2 all say their newer treatments are better, and some gullible doctors prescribe them, but the independent research papers all strongly recommend starting with metformin for insulin resistance. Of course, metformin eventually fails, and Type 2 diabetics must then supplement it with another medication, but the textbooks all say to start with metformin for Type 2, which strongly implies that Type 1 diabetics who have gotten older and developed insulin resistance should start with metformin.)