I was on Metformin last spring 2010. I’m Type 1 since 1998. I went on it due to high insulin resistance. I had insulin resistance to the extent that my doctors thought I had gastroparesis. I went on Metformin (1 pill per day at first) in the morning for a few weeks. Then I increased my dosage to one pill in the morning, one pill at dinner. My numbers improved quite a bit because my body was finally USING the insulin I was injecting.
I had to threaten my endocronologist to prescribe Metformin to me. He kept saying that it was a Type 2 drug and that I wasn’t eligible. I told him I would keep taking the insulin, but also wanted to take Metformin.
I was on Metformin a total of 3 months before it seemed like my body was kick-started and re-booted. My A1c has dropped 2% since coming off of Metformin and I seriously credit my experience with Metformin for the short 3 months that I was taking it for my tight A1c control. After I give birth (I’m currently 5 months pregnant) I will likely go back on Metformin for a few months to help get my insulin intake back down to what it was before becoming pregnant.
My endo prescribed me 2 tablets per day right from the start, but I believe it was smart to ease into it. Watch your numbers as they will likely go low until you lower your insulin intake. You may even need to lower your basal. I know I did. I posted a blog on TuD about Metformin and Type 1 last year.
One side effect was… if you take one pill too many… you WILL pay the price. I was soooo sick because I took 2 at dinnertime when I forgot that I already took one that morning. Oh boy. A few hours later it was like my intestines were pouring out of my body. I swear I lost 15 pounds that night.
Good luck! I recommend it.