Articles: opioid-analgesics.
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Journal of anesthesia · Feb 2025
The effects of frailty on opioid consumption after total knee arthroplasty.
This study evaluated the effects of frailty on postoperative opioid consumption in elderly patients. ⋯ Our study results indicate that frailty, easily assessed preoperatively in elderly surgical patients, is a significant predictor of postoperative opioid consumption.
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The concomitant epidemics of chronic pain and opioid misuse in the United States have led to a call for novel analgesics with limited abuse potential. Previously, we have shown that co-delivery of a novel combination targeting both μ- and δ-opioid receptors in the peripheral and central nervous systems can produce synergistic analgesia. Loperamide, a peripherally restricted μ-opioid agonist, and oxymorphindole, a δ-opioid receptor partial agonist, synergize in multiple mouse models of hyperalgesia. ⋯ From these data we conclude that the combination of oxymorphindole and loperamide or the combination of N-benzyl-oxymorphindole and loperamide reverse incisional hyperalgesia, likely by acting in the periphery, in a large animal model without adverse effects on respiration or heart rate. PERSPECTIVE: This article presents novel opioid combinations, the μ-opioid agonist loperamide with a δ-opioid agonist, either oxymorphindole (OMI) or N-benzyl-oxymorphindole (BOMI), that relieve pain in mice and pigs without adverse side effects. These therapies could help clinicians manage pain in patients while reducing overall opioid burden and limiting side effects.
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Reg Anesth Pain Med · Jan 2025
Impact of preoperative opioid exposure on cost of care and workplace productivity loss after elective surgery.
A high proportion of surgical patients has previous opioid exposure, which is associated with poorer recovery and increased morbidity. However, much less is known regarding the direct and indirect costs that are associated with healthcare utilization among individuals on preoperative opioid therapy. ⋯ High preoperative opioid use is associated with increased healthcare utilization and costs following common elective surgery. Future efforts should focus on this patient population to explore interventions that could optimize value-based care by improving outcomes and reducing costs.
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Cochrane Db Syst Rev · Jan 2025
Dexmedetomidine for analgesia and sedation for procedural pain or discomfort in newborn infants.
This is a protocol for a Cochrane Review (intervention). The objectives are as follows: To assess the benefits and harms of dexmedetomidine compared with opioids, non-opioids and placebo in providing sedation and analgesia for procedural pain in newborn infants.
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Increasing evidence indicates that neuropeptide FF (NPFF) produces analgesic effects and augments opioid-induced analgesia at the spinal level. However, our recent research demonstrated that NPFF exerted complex opioid-modulating effects in an inflammatory pain model after intrathecal (i.t.) injection. Consistent with previous findings, we found that i.t. ⋯ Moreover, these modulating effects of spinal NPFFR2 were selectively targeting mu-opioid receptor, had no effect on delta- and kappa-opioid receptor agonist-induced analgesia. Finally, the opioid-modulating effects of NPFF were further verified using in vitro calcium imaging assay, demonstrating that pretreated with NPFF in primary-cultured spinal neurons significantly attenuated the inhibitory effects of morphine on high-K+-induced neuronal excitability. Taken together, our results suggested that NPFF exhibited dual modulating effects on morphine-induced analgesia after i.t. administration, which provides a possible mechanism to explain the complex opioid-modulating effects of endogenous NPFF systems.