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Anticipating and managing opioid side effects in the elderly.

Pain is a common complaint in the elderly, and opioids are useful agents for management of both acute and chronic pain. Opioids are known to cause a variety of adverse effects, and these adverse effects can be particularly problematic for the frail elderly patient and may limit their use. As a result, this can lead to undertreatment of pain and poor patient outcome. Understanding, anticipating, and managing opioid side effects is an important component of care for the elderly patient.