The class of drugs with the highest risk is sedative anti-psychotics, with a 35 per cent increased risk. That was followed by benzodiazepines (like Valium and Ativan) with 25-30 per cent increased risk, and high-potency opioids (including hydromorphone, codeine and morphine), which increased the risk of collisions by 24 per cent. "Here [with medications] we found a 25-30 per cent increased risk, which sounds like a lot, but if you're driving just at the legal limit, your risk is doubled, so that would be 100 per cent increased risk," he said. For people using these medications, Brubacher just suggests being aware of the increased risk, noting that tolerance to drugs doesn't appear to reduce it. He said combining any of the higher risk medications with alcohol is a bad idea.

Source: CBC News April 24, 2021 17:00 UTC