Pain medicine : the official journal of the American Academy of Pain Medicine
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The temporal stability (test-retest reliability) of temporal summation of pain (TS) and conditioned pain modulation (CPM) has yet to be established in healthy older adults. The purpose of this study was to compare the temporal stability of TS and CPM in healthy older and younger adults and to investigate factors that might influence TS and CPM stability. ⋯ These findings suggest that TS and CPM may be more reliable in younger compared with older adults. Furthermore, psychological states may be an important factor influencing the stability of TS in healthy adults.
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To assess CYP2D6 genotype prevalence in chronic pain patients treated with tramadol or codeine. ⋯ Genotyping can facilitate personalized pain management with opioids, as specific alleles are related to decreased efficacy and adverse effects.
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For most patients with chronic low back pain (cLBP), the cause is "nonspecific," meaning there is no clear association between pain and identifiable pathology of the spine or associated tissues. Laypersons and providers alike are less inclined to help, feel less sympathy, dislike patients more, suspect deception, and attribute lower pain severity to patients whose pain does not have an objective basis in tissue pathology. Because of these stigmatizing responses from others, patients with cLBP may feel that their pain is particularly unjust and unfair. These pain-related injustice perceptions may subsequently contribute to greater cLBP severity. The purpose of this study was to examine whether perceived injustice helps explain the relationship between chronic pain stigma and movement-evoked pain severity among individuals with cLBP. ⋯ These results suggest that perceived injustice may be a means through which chronic pain stigma impacts nonspecific cLBP severity and physical function.
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To evaluate currently approved analgesics, that is, opioids, nonsteroidal anti-inflammatory drugs (NSAIDs), anticonvulsants, and serotonin and norepinephrine reuptake inhibitors (SNRIs) used as analgesics, for 1) differences in pharmacokinetic parameters under fed vs fasting conditions and 2) factors involved in dosage recommendations in relation to food. ⋯ Overall, because food effects could alter the onset and/or duration of pain relief, analgesic medication should be used as per labeled recommendations for proper pain management.
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Multicenter Study Observational Study
Effectiveness and Safety of Intrathecal Ziconotide: Final Results of the Patient Registry of Intrathecal Ziconotide Management (PRIZM).
The Patient Registry of Intrathecal Ziconotide Management evaluated the long-term effectiveness and safety of intrathecal ziconotide. ⋯ Final study analyses showed that intrathecal ziconotide provided clinically meaningful pain relief in 17.4% and 38.5% of patients at week 12 and month 18, respectively. At these same time points, patient-rated improvement was reported in at least two-thirds of patients. The safety profile was consistent with that listed in the ziconotide prescribing information.