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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Rheumatology international 3 (1983), S. 47-48 
    ISSN: 1437-160X
    Keywords: Rheumatoid ; Clinical ; Seropositive ; Radiological ; Seronegative
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary It has recently been suggested that a subpopulation of patients with rheumatoid arthritis, diagnosed on clinical, radiologic and pragmatic grounds, but with negative rheumatoid factor tests, represents a clinical entity quite distinct from that of seropositve rheumatoid arthritis. We have studied 60 sequentially presenting patients, 30 of whom were selected because they were seronegative, and 30 selected because they were seropositive in regard to IGM rheumatoid factor. The only major differences detected between the two groups on ‘blind’ assessment were a greater tendency to deformity, a greater degree of erosion and the presence of subcutaneous nodules in the seropositive group. Seronegative and seropositive rheumatoid arthritis appear to have very similar clinical features, but differing degrees of severity.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-9949
    Keywords: Fibromyalgia ; Adverse Effects ; P450IID6 Polymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Objective: To assess the frequency of adverse drug reaction in patients with fibromyalgia in relation to medications prescribed for this condition. To evaluate the potential role of the P450IID6 phenotype in the pathogenesis of these adverse drug reactions. Methods: Thirty-five patients with fibromyalgia were assessed using a structured questionnaire with demographic and clinical data and perceived adverse drug reactions. A sample of 60 patients with rheumatoid arthritis and 62 patients with localized back pain served as controls. The P450IID6 phenotype was determined for each of the fibromyalgia patients. Results: Overall, 141 patients had used NSAID and 79 (56%) of them reported adverse effects. Antidepressant drugs were used by 68 patients and 35 (51%) patients had adverse effects. Muscle relaxant drugs were used by 48 patients and 15 (31%) of them reported side effects. Analgesics were used by 122 patients and 22 (18%) had experienced adverse effects. Statistical differences in the frequency of adverse effects were found with antidepressant drugs in the fibromyalgia group, compared with rheumatoid arthritis (p=0.01) and back pain (p=0.02). Four of the 35 patients (11.4%) had a metabolic ratio (M.R.) greater than 0.30 (log M.R.=−0.52) indicative of the poor metabolizers (PM) phenotype. M.R. varied from 0.005 (log M.R.=−2.30) to 4.99 (log M.R.=0.70). Conclusions: The problem of adverse drug reactions in fibromyalgia patients does not appear to correlate with the PM phenotype of the P450IID6 oxidative enzyme. It also is unlikely that altered xenobiotic detoxification attributable to this PM phenotype would have a significant role in the development of fibromyalgia.
    Type of Medium: Electronic Resource
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