ABSTRACT: The complexities of chronic nonmalignant pain and the contributions of psychosocial and environmental factors require assessment and treatment strategies that may go far beyond the use of analgesics. The first step is to rule out serious underlying conditions; determine the chronicity, quality, location, and intensity of the pain; assess aggravating environmental factors; and evaluate the patient's level of functioning. The pharmacologic regimen may include oral or topical analgesics, antidepressants, muscle relaxants, nerve stabilizers, and/or opioids. A comprehensive plan includes alternative modalities, such as physical and occupational therapy, stress management, relaxation techniques, and the treatment of comorbid conditions, including anxiety, depression, and sleep disorders. The optimal opioid regimen consists of methadone or a sustained-release opioid combined with a short-acting opioid for breakthrough pain.