Morphine equivalents: oral solid opioids share in U.S. by drug 2010-2017
In 2017, tramadol accounted for 13 percent of the prescription oral solid opioid market based on morphine equivalents (MEQ), compared to 11 percent in 2010. However, over the whole given period oxycodone was by far the predominant oral solid opioid when based on morphine equivalents.