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  • Title: Alendronate in the treatment of Paget's disease of bone.
    Author: Khan SA, Vasikaran S, McCloskey EV, Benéton MN, Rogers S, Coulton L, Orgee J, Coombes G, Kanis JA.
    Journal: Bone; 1997 Mar; 20(3):263-71. PubMed ID: 9071478.
    Abstract:
    We studied four treatment regimens of oral alendronate in 60 patients with active Paget's disease. Two groups received an oral daily dose of either 40 or 80 mg of alendronate for 3 months, followed by placebo for a further 3 months: the other two groups received treatment with 40 or 80 mg per day for 6 months. Activity of alkaline phosphatase and urinary hydroxyproline excretion were measured before, during, and after treatment, at intervals for a total follow-up of 1 year. A transiliac bone biopsy was performed in 24 patients before and after the treatment. An additional 16 patients had a third biopsy more than a year after stopping treatment. Alendronate induced a marked suppression in the urinary excretion of hydroxyproline within 2 weeks (p < 0.01) followed by a fall in serum activity of alkaline phosphatase at 1 month (p < 0.01) in all treatment groups. Nine months after the start of treatment patients treated with 80 mg for 6 months had a significantly lower mean alkaline phosphatase activity compared to the other treatment groups (p < 0.02), which persisted at 1 year (p < 0.05). Alkaline phosphatase decreased to within the laboratory reference range in all patients given 80 mg for 6 months. In contrast, alkaline phosphatase decreased to within the laboratory reference range in 73-83% of patients given 80 mg for 3 months and the 40 mg dose. Histomorphometric assessment showed a decrease in indices of bone turnover in the pagetic biopsies. None of the biopsies taken after treatment showed evidence of impaired mineralization of bone. Gastrointestinal side effects occurred in 25% of patients of whom two withdrew from treatment. We conclude that oral alendronate is an effective agent for the treatment of Paget's disease of bone.
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