For how we live.
The beliefs — that Black patients' skin is thicker, their nerve endings less sensitive — predicted lower pain ratings and less accurate treatment recommendations for a Black patient in the same experiment.
An updated systematic review of 25 randomised trials found small effects, concentrated in neuropathic pain, alongside moderate to large increases in dizziness, sedation and nausea. Long-term data barely exist.
OPAL randomised 347 people in Australian primary care and emergency departments. At six weeks the opioid group's mean pain score was slightly worse than the placebo group's.
Pain medicine added a third mechanistic category in 2017 and has been arguing about it since. There is no test for it, the criteria work by exclusion, and the experts who wrote them say that is a problem.