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Last reviewed: March 2026
Opioid conversions are high-risk clinical decisions. Errors can cause serious harm including overdose or undertreated pain.
The conversion coefficients in this tool are illustrative placeholders only. They have NOT been verified for clinical use. You must replace them with values from your institution's approved formulary or a validated clinical reference before using any result in patient care.
Methadone and transdermal fentanyl conversions require specialist oversight and are not suitable for estimation using simple OME ratios.
Always involve a clinical pharmacist and/or pain/palliative care specialist for opioid rotations in complex patients.