Mr. lybrate-user, Thanks for the query.
The information is very scanty. I need to know what are the fasting & PP glucose levels & HbA1c%? Normally we do not give any medication for prediabetes. In your case the main problem is your excess weight. If you cut down that by even 5 to 8 % the glucose levels will come down. Your ideal body weight should be only 65 kgs, that means there are 25 kgs extra. This is an invitation for
diabetes. Metformin is a safe drug, but weight reduction alone will bring down the glucose levels back to normal. Thanks.