Opioid Conversion & MME Practice Problems
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Opioid math converts between opioids and routes using an equianalgesic table anchored to 30 mg of oral morphine, and totals a regimen in morphine milligram equivalents (MME) for safety review. Fentanyl patch selection is a separate range-based lookup.
FormulasProportion from the equianalgesic table (30 mg PO morphine = anchor)MME/day = daily dose × (30 ÷ that drug's equianalgesic dose)
Worked example
Oxycodone 10 mg three times daily = 30 mg/day. Table: 20 mg oxycodone ≈ 30 mg morphine, so MME = 30 × (30 ÷ 20) = 45 MME/day.
💡 90 MME/day is the common safety-review threshold; watch route differences — the same drug by a different route has a different number.