Pain medicine : the official journal of the American Academy of Pain Medicine
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Randomized Controlled Trial
The Response of the Primary Motor Cortex to Neuromodulation is Altered in Chronic Low Back Pain: A Preliminary Study.
Neuromodulation is increasingly investigated for the treatment of low back pain (LBP). However, the neurophysiological effects of common neuromodulatory techniques (anodal transcranial direct current stimulation [tDCS] and peripheral electrical stimulation [PES]) have not been investigated in people with chronic LBP. Here we aimed to compare the effect of three neuromodulatory protocols (anodal tDCS, high intensity PES, and a priming protocol of combined tDCS/PES) on primary motor cortex (M1) excitability in people with and without chronic LBP. ⋯ The neurophysiological response to common neuromodulatory treatments differs between people with and without LBP. This has relevance for the design and tailoring of neuromodulation in pain. Further, if the goal of treatment is to increase M1 excitability, a priming protocol (e.g., combined tDCS + PES) may be more effective than tDCS alone.
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Randomized Controlled Trial
A Randomized, Double-Blind, Placebo- and Active Comparator-Controlled Phase I Study of Analgesic/Antihyperalgesic Properties of ASP8477, a Fatty Acid Amide Hydrolase Inhibitor, in Healthy Female Subjects.
To evaluate the analgesic/antihyperalgesic effect of ASP8477. ⋯ ASP8477 was well tolerated in this study. Analysis of all subjects did not demonstrate a significant difference in LEP for ASP8477 100 mg over placebo but did in subjects who demonstrated positive capsaicin skin effects.
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Randomized Controlled Trial Multicenter Study
Efficacy of Lubiprostone for the Treatment of Opioid-Induced Constipation, Analyzed by Opioid Class.
To examine the efficacy and safety of lubiprostone for the treatment of opioid-induced constipation (OIC) in patients by opioid class received. ⋯ In patients using commonly prescribed opioids, lubiprostone is effective and generally well tolerated for the treatment of OIC.
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Randomized Controlled Trial
How Classical Conditioning Shapes Placebo Analgesia: Hidden versus Open Conditioning.
To investigate the influence of expectancy of pain intensity, fear of pain (trait), and fear (state) on the effectiveness of hidden and open conditioning to produce placebo analgesia. ⋯ Fear seems to be a more important factor than expectancy in producing placebo analgesia induced by hidden conditioning.
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Randomized Controlled Trial Multicenter Study
Efficacy and Safety of Lubiprostone in Patients with Opioid-Induced Constipation: Phase 3 Study Results and Pooled Analysis of the Effect of Concomitant Methadone Use on Clinical Outcomes.
The efficacy and safety of oral lubiprostone for relieving symptoms of opioid-induced constipation (OIC) in patients with chronic noncancer pain were evaluated in a randomized, double-blind, placebo-controlled study. These data were also pooled with those from two similar phase 3 studies to explore the effects of methadone on treatment response. ⋯ The phase 3 study did not meet its primary efficacy end point. However, analysis of pooled data from all phase 3 studies in the OIC clinical development program, stratified by methadone opioid usage, confirmed that lubiprostone is effective for treatment of OIC in patients taking nonmethadone opioids; no safety concerns were identified based on the type of opioid used.