Equianalgesic (Narcotic) conversion chart. Provides dosage conversion guidelines for common opiates for health care providers.

Opioids - Equianalgesic Dosages

Drug	Duration	Half-life	Route	Equianalgesic Dosage
Codeine	4–6 h	3 h	IM	120 mg
			PO	200 mg
Fentanyl	1–2 h	1.5–6 h	IM	0.1 mg
Hydrocodone	4–8 h	3.3–4.5 h	PO	30 mg
Hydromorphone	4–5 h	2–3 h	IM	1.3–1.5 mg
			PO	7.5 mg
Levorphanol	6–8 h	12–16 h	IM	2 mg
			PO	4 mg
Meperidine	2–4 h	3–4 h	IM	75 mg
			PO	300 mg
Methadone	4–6 h	15–30 h	IM	10 mg
			PO	10–20 mg
Morphine	3–7 h	1.5–2 h	IM	10 mg
			PO	30–60 mg
Oxycodone	4–6 h	NA	PO	15-30 mg (20 mg)
Oxymorphone	3–6 h	NA	IM	1 mg
			PR	10 mg
Propoxyphene	4–6 h	6–12 h	PO	130-200 mg * (Inconclusive data)
*Propoxyphene HCL: 130mg; Napsylate: 200mg. Not recommended for chronic pain.