![](https://www.diabetesnews.com/wp-content/uploads/2014/02/1376258597_Metformin-150x150.jpg)
Few doctors are prescribing a low-cost drug that has been proven effective in preventing the onset of diabetes, according to a UCLA study. The study, published in the peer-reviewed journal Annals of Internal Medicine, found that only 3.7 percent of U.S. adults with pre-diabetes were prescribed metformin during a recent three-year period.