alexa Increased capsaicin-induced secondary hyperalgesia as a marker of abnormal sensory activity in patients with fibromyalgia.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Clinical & Experimental Pharmacology

Author(s): Morris V, Cruwys S, Kidd B

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Abstract In this study, capsaicin-induced secondary hyperalgesia was assessed as a marker of abnormal nociceptive processing in patients with fibromyalgia (FM). The area of mechanical secondary hyperalgesia induced by a standard solution of capsaicin placed on the volar forearm was measured in ten patients with FM and the results compared to those obtained in ten patients with rheumatoid arthritis (RA) and ten normal subjects. The area of secondary hyperalgesia was found to be substantially increased in both the FM and RA groups compared with controls. In the FM group the area of hyperalgesia correlated with the overall pain score and with the joint tenderness score. The results suggest that in FM there is enhanced sensitivity of nociceptive neurones at a spinal level, thereby supporting the concept of a generalised disturbance of pain modulation in this disorder.
This article was published in Neurosci Lett and referenced in Journal of Clinical & Experimental Pharmacology

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