T. Dupont

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Opiates such as morphine have a direct spinal effect, acting at special receptor sites in the dorsal horn. When morphine is administered epidurally, it diffuses to the cord substance, producing analgesia of improved quality after a dose of 2 to 4 mg. A protracted analgesia is produced, compared with parenteral narcotics, with a median duration of effect of(More)
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