Pain medicine : the official journal of the American Academy of Pain Medicine
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Randomized Controlled Trial
The association between psychopathology and placebo analgesia in patients with discogenic low back pain.
Chronic low back pain patients have a high rate of psychopathology, comprised mainly of depression, anxiety, and high levels of neuroticism. We previously found that psychopathology is associated with increased placebo analgesia in this patient group. ⋯ This study indicates that high and moderate levels of psychopathology are associated with heightened placebo analgesia in chronic low back pain patients. Expectations were only an influence in the high psychopathology group, and neuropathic pain affects placebo responses. These findings have implications for future research characterizing placebo responders.
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To investigate whether grouping of patients with back pain into similar behavioral patient profiles using SF-36 scores is predictive of outcome following 1-year treatment in a multidisciplinary spine center beginning with referral for epidural steroid injection. ⋯ The SF-36-determined subgroups did not predict response to a multidisciplinary pain clinic. All three subgroups showed similar improvement following treatment.
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A 47-year-old woman who underwent allogenic peripheral blood stem cell transplant developed withdrawal symptoms soon after Fentanyl 25 mcg/h patch was stopped, which has not been reported at this dose. Possible causes, such as the inhibition of CYP3A4 induced by cyclosporine causing elevations of serum fentanyl, are discussed.