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Methadone hydrochloride is a mu-opioid agonist that has been used for the treatment of pain and for the management and maintenance of opioid withdrawal for over 50 years. Several characteristics make methadone a useful drug. However, these same…

Morphine, the most widely used mu-opioid analgesic for acute and chronic pain, is the standard against which new analgesics are measured. A thorough understanding of the pharmacokinetics of morphine is required in order to safely and effectively use…