Yes, Samantha it will do that. It's important that you reduce the dose back to only one tablet per day, or even half a tablet per day, wait for the diarrhoea to subside and then increase the dose.

I tolerate metformin fairly well (I'm on two 850mg per day at the moment), and have been on it for a year, but I've always had to gradually increase my dosage. I'm actually really surprised your doctor had you start on two tablets per day straight off.

BW