Journal of pain & palliative care pharmacotherapy
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J Pain Palliat Care Pharmacother · Sep 2014
ReviewTherapeutic challenges in cancer pain management: a systematic review of methadone.
The proven therapeutic efficacy of methadone in cancer pain is hindered by a challenging pharmacokinetic-pharmacodynamic profile, considerable interpatient variation, and increasing concern about the complexities of dosing. The objective of this study was to assess the evidence for the use of methadone in cancer pain management. The authors conducted a systematic literature search for randomized controlled trials (RCTs) published post the 2007 Cochrane review of methadone in cancer pain. ⋯ Methadone has an important role in the management of cancer pain, with many advantages including low cost, high oral bioavailability, rapid onset of action, once-daily dosing, and postulated benefits in difficult pain control scenarios. However, due to limited research in this area, methadone dosing remains a challenge, with vigilant dose initiation, adjustment, and monitoring required. There is a need for further studies using standardized methodology to evaluate the optimal dosing strategy of methadone, the effect on different types of pain, and the role of pharmacokinetics and pharmacogenomics in clinical outcomes.
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J Pain Palliat Care Pharmacother · Sep 2014
Case ReportsPain management discussion forum: prevention of chronic postoperative pain.
ABSTRACT A case of a 35-year-old woman scheduled for removal of a painful breast tumor is discussed. Ways to reduce risk of chronic pain developing postoperatively are described. ⋯ This report is adapted from paineurope 2014; Issue 1, Haymarket Medical Publications Ltd., and is presented with permission. paineurope is provided as a service to pain management by Mundipharma International, Ltd., and is distributed free of charge to health care professionals in Europe. Archival issues can be accessed via the Web site: http://www.paineurope.com, at which European health professionals can register online to receive copies of the quarterly publication.
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J Pain Palliat Care Pharmacother · Sep 2014
The pharmacokinetics, efficacy, safety, and ease of use of a novel portable metered-dose cannabis inhaler in patients with chronic neuropathic pain: a phase 1a study.
Chronic neuropathic pain is often refractory to standard pharmacological treatments. Although growing evidence supports the use of inhaled cannabis for neuropathic pain, the lack of standard inhaled dosing plays a major obstacle in cannabis becoming a "main stream" pharmacological treatment for neuropathic pain. The objective of this study was to explore the pharmacokinetics, safety, tolerability, efficacy, and ease of use of a novel portable thermal-metered-dose inhaler (tMDI) for cannabis in a cohort of eight patients suffering from chronic neuropathic pain and on a stable analgesic regimen including medicinal cannabis. ⋯ A significant 45% reduction in pain intensity was noted 20 minutes post inhalation (P = .001), turning back to baseline within 90 minutes. Tolerable, lightheadedness, lasting 15-30 minutes and requiring no intervention, was the only reported adverse event. This trial suggests the potential use of the Syqe Inhaler device as a smokeless delivery system of medicinal cannabis, producing a Δ(9)-THC pharmacokinetic profile with low interindividual variation of Cmax, achieving pharmaceutical standards for inhaled drugs.
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J Pain Palliat Care Pharmacother · Sep 2014
Comparative StudyClinicians' perspective on the use of immunoassay versus definitive laboratory quantitation methodologies for medication monitoring.
Treating chronic pain is complicated. Primary care doctors and others are called on to treat the vast majority of patients with pain, to do so in brief visits and to do it safely. This is a tall order, but it is possible to do it well when the proper tools are employed to aid the clinician in diagnosing and monitoring the patient. ⋯ When medically necessary, it makes sense to seek definitive testing from the laboratory to confirm results of immunoassay tests with chromatographic testing and/or when there is the possibility of a false negative in the office. These "false negatives" are extremely common, with patients using nonprescribed opioids and illicit medications often go undetected if one were to stop at the office-based result. These patients are in danger of addiction and overdose, and this added information is crucial in efforts to treat pain and avoid these complications.