Opioid Potency Comparison
Analgesic potency of opioids
Oral-parenteral ratio: for example, morphine is 6 times more potent parenterally than orally.
Potency relative to morphine: for example, hydromorphone is 6 times more potent than an equal dose of morphine when given parenterally.
Mitchell JP: General Care of the Patient, in Manual of Medical Therapeutics, 26th ed by Claiborne D and Ridner M (eds). Little, Brown and Co. 1989. p5.
ORAL-PARENTERAL POTENCY RATIO
PARENTERAL POTENCY RELATIVE TO MORPHINE (for equal doses)
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