Patients who are opioid tolerant are those receiving, for 1 week or longer, at least 60 mg/day orally morphine, 25 mcg/hour transdermal fentanyl, 30 mg/day orally oxycodone, 8 mg/day orally hydromorphone, 25 mg/day orally oxymorphone, or an equianalgesic dose of another opioid
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