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Dose conversion between opiates

Change from (total daily dose in mg)									Change to (total daily dose in mg)
Oral codeine	Oral dihydro- codeine	Oral pethidine	Oral morphine	Oral dextro- moramide	Morphine infusion	Diamorphine infusion	Oral hydro- morphone	Sublingual buprenorphine	Change to (total daily dose in mg)
									Oral codeine
									Oral dihydrocodeine
									Oral pethidine
Divide by 12.5	Divide by 10	Divide by 10		Multiply by 2	Multiply by 3	Multiply by 4	Multiply by 7.5	Multiply by 50	Oral morphine
Divide by 25	Divide by 20	Divide by 20	Divide by 2		Multiply by 1.5	Multiply by 1.5	Multiply by 4	Multiply by 25	Oral dextromoramide
Divide by 40	Divide by 30	Divide by 30	Divide by 3	Divide by 1.5		Multiply by 1	Multiply by 2.5	Multiply by 20	Morphine infusion
Divide by 40	Divide by 30	Divide by 30	Divide by 3	Divide by 1.5	Divide by 1		Multiply by 2.5	Multiply by 20	Diamorphine infusion
Divide by 100	Divide by 75	Divide by 75	Divide by 7.5	Divide by 4	Divide by 2.5	Divide by 2.5		Multiply by 7	Oral hydromorphone
			Divide by 50	Divide by 25	Divide by 20	Divide by 20	Divide by 7		Sublingual buprenorphine

Intended as a guide only - titrate individually according to pain, response and side effects.