Articles: opioid.
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Behavioural pharmacology · Jun 2021
Effects of remifentanil/histamine mixtures in rats responding under a choice procedure.
Intravenous drug self-administration remains the 'gold standard' for assessing abuse liability. Failure of a drug to maintain self-administration might indicate the absence of positive reinforcing effects but might also indicate the presence of aversive effects. Sensitivity to aversive and punishing effects of drugs (as well as nondrug stimuli) might collectively determine the likelihood of use, abuse and relapse. ⋯ The effects of remifentanil/histamine mixtures generally were different from the constituent doses of histamine alone but not from remifentanil alone. A mixture containing 3.2 mg/kg/infusion histamine and either 0.001 or 0.0032 mg/kg/infusion remifentanil was not different from saline but was different from the effects of the constituent dose, insofar as choice increased compared with 3.2 mg/kg/infusion histamine alone and decreased compared with 0.001 or 0.0032 mg/kg/infusion remifentanil alone. Reinforcing doses of remifentanil combined with punishing doses of histamine can yield mixtures that are neither preferred nor avoided, offering 'proof-of-principle' for using drug mixtures to avoid adverse effects of opioid receptor agonists.
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Expert Opin Pharmacother · Jun 2021
Can NSAIDs and Acetaminophen Effectively Replace Opioid Treatment Options for Acute Pain?
Opioid analgesia for acute painful conditions has come under increasing scrutiny with the public health crisis of opioid overdose, leading clinicians to seek nonopioid alternatives, such as nonsteroidal anti-inflammatory drugs (NSAIDs) and acetaminophen (paracetamol). ⋯ The short-term use of opioids under close clinical supervision, such as in-hospital use of opioid analgesics for postoperative pain, may be appropriate, but even here, combination therapy or nonopioid therapy may be preferred. The use of opioids even for acute pain of short duration has been questioned. The ideal analgesic has yet to be developed, but effective pain control pharmacological regimens for acute pain are available.
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Arch Orthop Trauma Surg · Jun 2021
Meta AnalysisPrevalence and risk factors for prolonged opioid use after total joint arthroplasty: a systematic review, meta-analysis, and meta-regression.
Opioids are a mainstay for pain management after total joint arthroplasty (TJA). The prevalence and risk factors for prolonged opioid use after TJA are important to understand to help slow the opioid epidemic. We aim to summarize and evaluate the prevalence and time trend of prolonged opioid use after TJA and pool its risk factors. ⋯ To our knowledge, this is the first meta-analysis determining the risk factors of prolonged opioid use and characterizing its rate and time trend in TJA. Understanding risk factors for patients with higher potential for prolonged opioids use can be used to implement appropriate management strategies, reduce unsafe opioid prescriptions, and decrease the risk of prolonged opioid use after TJA.
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Emerg Med Australas · Jun 2021
Estimating the proportion of patients who transition to long-term opioid use following oxycodone initiation in the emergency department.
To report the number of patients discharged from ED with oxycodone immediate release (IR) over 12 months and estimate the proportion who potentially transition to long-term opioid use and subsequent injectable heroin use. ⋯ Modelling opioid use behaviour in an ED population demonstrated the potential development of unintentional long-term opioid use, and associated harms. Prospective study is required to fully understand trajectories of patients dispensed outpatient therapy from Australian EDs.