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Effects of a combined alendronate and calcitriol agent (Maxmarvil®) on bone metabolism in Korean postmenopausal women: a multicenter, double-blind, randomized, placebo-controlled study

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Abstract

Introduction

A randomized, double-blind, prospective, 24-week clinical trial was performed to evaluate the effects of a combinative agent, Maxmarvil, of calcitriol (0.5 μg) and alendronate (5 mg) on bone metabolism in postmenopausal women.

Methods

A total of 217 postmenopausal women with osteoporosis were enrolled; 199 patients were randomly assigned to one of two treatment groups (Maxmarvil group or alfacalcidol group). None of the patients were vitamin-D-deficient, as assessed by serum 25-hydroxyvitamin D (25(OH)D), nor had they received any drugs affecting bone metabolism before enrollment. Bone mineral densities (BMD) of L1–L4 and the femur were measured by dual-energy X-ray absorptiometry (DXA) at the initial assessment and after 6 months of treatment. Serum biochemical assays, including serum calcium, 24-h urinary calcium excretion, and bone turnover markers (both bone-specific alkaline phosphatase [bsALP] and urine N-telopeptide [NTx]), were performed at the baseline and after 3 and 6 months of treatment.

Results

In the Maxmarvil group, the BMD of the lumbar spine increased up to 2.42±0.5% from the baseline after 6 months (p<0.05). On the other hand, the change in BMD in the alfacalcidol group was 0.28±0.5% after 6 months. There was no significant difference in femoral BMD between the two groups. The levels of bsALP and NTx were significantly lower in the Maxmarvil group than in the alfacalcidol group (−22.04±3.9% vs. −11.42±2.8% [p<0.05] and −25.46±5.2% vs. 1.24±6.2% [p<0.001], respectively). Interestingly, there was a significantly smaller amount of 24-h urinary calcium in the Maxmarvil group (p<0.05).

Conclusions

Our study demonstrates that a combination of calcitriol and alendronate is quite effective in preventing bone loss, with the advantage of lesser hypercalciuric effect of calcitriol in the postmenopausal osteoporotic women.

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Correspondence to S.-K. Lim.

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Rhee, Y., Kang, M., Min, Y. et al. Effects of a combined alendronate and calcitriol agent (Maxmarvil®) on bone metabolism in Korean postmenopausal women: a multicenter, double-blind, randomized, placebo-controlled study. Osteoporos Int 17, 1801–1807 (2006). https://doi.org/10.1007/s00198-006-0200-4

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  • DOI: https://doi.org/10.1007/s00198-006-0200-4

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