Experts say cannabis-based medicines, including those that contain THC, should be used instead of opioids. Elderly people with chronic pain including back and joint injuries should be prescribed cannabis instead of conventional painkillers, doctors have said, as polling shows that three quarters of over-55s would consider taking it. Doctors said cannabis-based medicines, including those that contain THC, the chemical that makes recreational users “high”, should be used instead of opioid medications. Draft guidance published last…