On what condition metformin does can be reduced or is it something impossible?

Weight loss: Metformin helps those with type ii diabetes lose weight and manage their disease. If you are a candidate for bariatric surgery, and lose sufficient weight to be considered non-diabetic perhaps your physician will discontinue the medicine. There are other medications for diabetes that are typically added to metformin if weight loss insufficient. Try exercise too.

Reword the question?: Metformin is a drug and has mutliple doses depending on your condition the dose can be reduced it is possible.