Current pain and headache reports
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Curr Pain Headache Rep · Apr 2011
ReviewOpioid-induced hyperalgesia: clinically relevant or extraneous research phenomenon?
Opioids have become the unequivocal therapy of choice in treating many varieties of chronic pain. With the increased prescription of opioids, some unintended consequences have occurred. After prolonged opioid exposure, opioid-induced hyperalgesia (OIH), the paradoxical effect that opioid therapy may in fact enhance or aggravate preexisting pain, may occur. ⋯ However, not all evidence supports the clinical importance of OIH, and some question whether the phenomenon exists at all. Here, we present a nonexhaustive, brief review of the recent literature. OIH will be reviewed in terms of preclinical and clinical evidence for and against its existence; recommendations for clinical evaluation and intervention also will be discussed.
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Pain is one of the most common reasons that patients seek treatment from health care professionals, often their primary care providers. One tool for treating pain is opioid therapy, and opioid prescriptions have increased dramatically in recent years in the United States. This article will review recent research about opioids that is most relevant to treating chronic pain in the context of a typical primary care practice. It will focus on four key practices that providers can engage in before and during the course of opioid therapy that we believe will enhance the likelihood that opioids, when used, are an effective tool for pain management: avoiding sole reliance on opioids; using adequate opioid doses to address pain; mitigating the risk of opioid misuse by patients; and fostering collaborative relationships for treating complex patients.
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Curr Pain Headache Rep · Apr 2011
Maladaptive opioid use behaviors and psychiatric illness: what should we do with what we know?
It is well established that opioids are broadly effective for chronic pain. Although there is some agreement that stable, moderate dosing is desirable; longer-term management of patients with chronic pain often confronts clinicians with difficult decisions regarding when to intensify opioid treatment and when to declare failure. ⋯ Some of these risk factors involve the presence of comorbid psychiatric illnesses, which puts clinicians in the difficult position of deciding whether or not to limit treatment to patients who are more complex. The authors discuss the issues of bad behavioral outcomes in opioid therapy, the implications of this emerging literature for clinicians, and suggest broad areas in which researchers can improve the knowledge base with which clinicians operate.
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Curr Pain Headache Rep · Feb 2011
ReviewDeep brain stimulation and motor cortical stimulation for neuropathic pain.
Deep brain stimulation (DBS) is an important treatment option for neuropathic pain. DBS has a considerable history, and it can be used successfully for a wide number of pain syndromes. ⋯ Less invasive than DBS, MCS has been rapidly adopted and studied since first described in 1991. A growing body of literature supports the use of MCS for facial pain, though further study to better define the mechanism of action and the most appropriate patient populations is ongoing.
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Hemicrania continua (HC) is a rare primary headache syndrome, characterized by unilateral pain and an absolute response to indometacin. Since the term was first coined in 1984, more than 100 cases have been described worldwide. ⋯ Functional imaging studies suggest a unique pattern of subcortical involvement in HC: contralateral to the pain posterior hypothalamic region, ipsilateral dorsal pons and ipsilateral ventral midbrain, which, along with the particular effect of indometacin, probably justifies its classification as a unique entity. Increasing the awareness of this primary headache form among clinicians will aid in its diagnosis while further work is being undertaken to characterize the syndrome.