The Clinical journal of pain
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Many theories exist on the pathogenesis of migraine. However, the clinical picture of migraine is agreed on universally as a familial disorder characterized by recurrent attacks of headache that are variable in intensity, frequency, and duration. The attacks are usually unilateral and often associated with anorexia, nausea, and vomiting. ⋯ A variety of medications, including ergotamine, propranolol, the calcium channel blockers, antidepressants, and nonsteroidal anti-inflammatory drugs (NSAIDs) have been beneficial in the prophylactic treatment of migraine. Ergotamine is the drug of choice in the abortive treatment, although other agents, such as the NSAIDs, have been used successfully. Inpatient therapy in a specialized unit for headache patients may be indicated for the recidivist patient, the patient habituated to analgesics or ergotamine, or the patient with the mixed headache syndrome, i.e., migraine occurring with coexistent muscle contraction headaches.
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Psychological factors are known to increase the severity and intensity of headaches. When they are shown to be present, an appropriate psychiatric diagnosis is the Diagnostic and Statistical Manual's (DSMIII-R) category of psychological factors affecting physical condition (code no. 316.0). ⋯ The factors overlap and intertwine in the average headache patient. Attention to these factors in a systematic way should enhance our understanding and treatment of the chronic headache patient.
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This article reviews the literature and describes clinical methods of providing analgesia for acute pain using epidural and intrathecal (spinal) opiates. The mechanism of action of these drugs, their basic pharmacology and spinal pharmacodynamics, and useful drugs and dosages are presented. The side effects of these drugs when administered by injection and possible ways to diminish their incidence and severity are discussed. A clinical protocol for the dosage and selection of these drugs is included.
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Opioid receptors are described and differentiated by their affinities for specific agonists and antagonists. Their sites of action and receptor activities are discussed. Tachyphylaxis and tolerance are described and methods for overcoming these problems are recommended. Suggestions are made regarding future drugs to act at specific receptors.
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Physicians have in their armamentaria of drugs and techniques sufficient methods of relieving postoperative pain to maintain an analgesic state in postsurgical patients. The extent of the problem, and the options available, are discussed and described.