Journal
JOURNAL OF NEUROLOGY NEUROSURGERY AND PSYCHIATRY
Volume 76, Issue 9, Pages 1294-1296Publisher
B M J PUBLISHING GROUP
DOI: 10.1136/jnnp.2004.056499
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Background: Epidemiological and ecological studies suggest links between vitamin D deficiency and increased multiple sclerosis (MS) prevalence. Objective: To evaluate the safety and tolerability of oral calcitriol therapy in an open label pilot study. Methods: 15 ambulatory patients with relapsing-remitting MS and at least one clinical relapse within the previous 12 months received oral calcitriol (target dose: 2.5 mu g/d) for 48 weeks. Dietary calcium was restricted to 800 mg/d. Patients were monitored using frequent clinical and laboratory examinations, the expanded disability status scale (EDSS), and brain magnetic resonance imaging (MRI). Results: Two patients withdrew because of symptomatic hypercalcaemia (serum calcium > 3.35 mmol/1 in each case) resulting from persistent dietary indiscretion. Two diet compliant patients required temporary dose adjustments for mild asymptomatic hypercalcaemia. Diet compliant patients experienced mild adverse effects. The on-study exacerbation rate (27%) was less than baseline. Four patients experienced five clinical relapses but only one patient worsened by > 1 EDSS point. Brain MRI revealed enhancing lesions in five, patients at baseline (33%) and in four (29%) at both 24 and 48 weeks. Conclusions: Oral calcitriol is safe and well. tolerated for up to one year by diet compliant relapsing-remitting MS patients. Further study of vitamin D related mechanisms is warranted in MS.
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