-Removed-No, I have no personal experience nor medical knowledge of the drug other than what I referenced. Anyone using the drug should do so only on advice of their doctor and also double-check what they can on the internet.
All I was saying is don't jump the gun based on rat studies and start taking a drug that could have negative effects too.
My own medical condition relates to the B12 and folic acid pathways. Sadly I have been told that further investigation would be either impossible in South Africa or astronomically expensive.
I do have diabetes in my family tree and will likely suffer from it in old age and may at that time start taking Metformin (on a doctors advice)