Alternatives to Metformin?

So, metformin has been working really well for me since I was diagnosed in March. Unfortunately, my doctor checked my liver levels, and they are not good at all. I have always been on the high side of normal, since I am overweight. I am also on plaquenil for my rheumatoid arthritis, which can affect the liver.

However, 2 weeks ago my doctor ran the liver test, and it came back almost triple. So I have been off of metformin for a week or so and just had my liver check again. The levels are down, which means she will probably keep me off of it.

Does anyone know of a good alternative that I might try? I am just trying to be prepared for my appointment next week. Since being off metformin, my numbers have risen some, but not significantly. While on the metformin, I was able to bring down my A1C from 12.1 at diagnosis to 6.5 2 weeks ago. I have changed my eating habits some, but I am not sure it will be enough on its own.