Convert opioid doses to morphine milligram equivalents.
MME standardizes opioid doses relative to morphine. CDC guidelines recommend avoiding ≥ 90 MME/day when possible and reassessing at ≥ 50 MME/day. Conversion factors: morphine = 1, oxycodone = 1.5, hydromorphone = 4, codeine = 0.15, tramadol = 0.1, fentanyl patch = 2.4 × mcg/hr. These are approximate; individual variation exists.