NEW YORK (Reuters Health) – People prescribed high doses of powerful painkillers are more likely to be injured while driving than those taking very low doses, according to a new study from Canada. The drugs, known as opioids, include common painkillers like codeine and oxycodone. High rates of opioid prescribing have become more of a concern in recent years, as deaths from overdoses rise and more drugs end up in the hands of people taking them for non-medical purposes. Their effect on road safety may be one more reason to think carefully about high-dose opioids, researchers said. …