Oh, please don't use drugs and medication to lose weight! Metformin is a glucose lowering prescription drug for diabetics.
Metformin lowers your glucose levels. If you take too much, you can get chronic diarrhea which can lead to weight loss BUT you play with death as you can fall into a coma if your glucose levels drop too low. You'll also become malnourished for causing diarrhea and interfering with your body's ability to digest and absorb nutrients from food.
It was reported that teens with diabetes refuse treatment because low insulin levels causes weight loss. But by the time you lose weight from untreated diabetes, you have some some serious, life-threatening damage to your kidneys, liver and pancreas. And of course, your eyes and brain!
Weight loss alone is no good without overall general well-being. Who wants to look thin and skeleton-like with a death pallor upon their skin and faces? Better to be healthy and vibrant with a rosy glow from proper eating and exercise, regardless of the weight.
Ask your doctor or in doctors' forums online about using Metformin for weight loss and see what medical professionals have to say.
