Articles: neuralgia.
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Oral baclofen, the most often prescribed antispastic drug, has been shown to be effective in trigeminal neuralgia. Spinal application of baclofen leads to a complete supression of spasticity even in cases in which no previous oral antispastic medication achieved a response. ⋯ Spinal baclofen has also been effective during long-term infusion with an implanted pump for more than 1 year. Spinal baclofen infusion seems to be a possibility in the treatment of severe trigeminal neuralgia resistant to other forms of therapy.
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Journal of neurology · Dec 1991
Clinical TrialTopical 0.025% capsaicin in chronic post-herpetic neuralgia: efficacy, predictors of response and long-term course.
In order to evaluate the efficacy, time-course of action and predictors of response to topical capsaicin, 39 patients with chronic post-herpetic neuralgia (PHN), median duration 24 months, were treated with 0.025% capsaicin cream for 8 weeks. During therapy the patients rated their pain on a visual analogue scale (VAS) and a verbal outcome scale. A follow-up investigation was performed 10-12 months after study onset on the patients who had improved. ⋯ Treatment effect was not dependent on patient's age, duration or localization of PHN (trigeminal involvement was excluded), sensory disturbance or pain character. Treatment response was not correlated with the incidence, time-course or severity of capsaicin-induced burning. If confirmed in controlled trials, the long-term results of this open, non-randomized study might indicate that the analgesic effect of capsaicin in PHN is mediated by both interference with neuropeptide metabolism and morphological changes (perhaps degeneration) of nociceptive afferents.
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Neuralgic pain during or following herpes zoster infection is a common problem in pain therapy. The current management of neuralgias due to zoster is discussed with reference to patients in a chronic pain clinic within an anesthesiology department. The courses of 80 patients followed up for at least 3 months from the pain clinic at the University Hospital in Kiel were analyzed. ⋯ If the history of zoster pain was less than 1 month, the majority of patients showed good or excellent results. On the other hand, only one-third of patients with a history longer than 6 months had adequate pain relief. Therefore, early and appropriate treatment is desirable for patients suffering from zoster neuralgias.
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One hundred and fifty-six patients with moderate to severe postherpetic neuralgia (PHN) were followed for up to 11 years. Nearly half of all patients were doing well at the final assessment (median 2 years) and more than half of these were on no therapy at this time. ⋯ More of these patients were noted to be using some form of treatment at follow up. A group of patients seemed to follow a progressive course and were refractory to all treatments used in this study.
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Acta Neurol. Scand. · Aug 1991
Pain and allodynia in postherpetic neuralgia: role of somatic and sympathetic nervous systems.
The immediate effects of selective sympathetic and somatic blockades on pain and tactile allodynia in 12 patients with long-standing ophthalmic or high cervical postherpetic neuralgia were compared. For the duration of the somatic blockade, pain was completely abolished in 11 patients and allodynia in 8 patients. ⋯ After successful somatic blockade, pain and allodynia reappeared with tactile sensation while thermal sensation was still absent. Pain and allodynia appear to be related to sensory impulses travelling along the large rather than the small diameter fibres; and the sympathetic system may only have a limited role.