Abstract
Abstract Disclosure: Y. Rhee: None. S. Ahn: None. N. Hong: None. D. Seo: None. S. Hong: None. Background: Although alendronate is the most prescribed oral bisphosphonate for osteoporosis treatment, it can lead to gastrointestinal problems, impacting treatment compliance and efficacy. This study aimed to assess the efficacy and safety of once-weekly alendronate sodium trihydrate (ALN-S), an oral solution, compared to once-weekly alendronate sodium (ALN-T), an oral tablet, in Korean postmenopausal women with osteoporosis. Methods: Conducted as a 12-month, multi-center, prospective, randomized, open-labeled, parallel trial at two hospitals in Korea, 170 postmenopausal women were randomized to ALN-S (N=85) or ALN-T (N=85). Bone mineral density (BMD) at the lumbar spine (LS), femoral neck (FN), and total hip (TH) was measured at baseline and after 12 months. Bone turnover markers, including C-telopeptide (CTX) and procollagen type 1 amino-terminal propeptide (P1NP), were assessed at baseline, 6 months, and 12 months. The primary outcome was the percentage change in LS BMD, evaluated for non-inferiority. Results: After 12 months, both ALN-S and ALN-T groups exhibited a significant increase in LS, FN, and TH BMD, with no significant intergroup differences (ALN-S: LS 5.0 ± 0.6%, FN 1.8 ± 0.6%, TH 2.2 ± 0.5%; ALN-T: LS 5.2 ± 0.6%, FN 1.6 ± 0.6%, TH 1.8 ± 0.5%). ALN-S was found to be non-inferior to ALN-T for BMD change at LS (treatment difference: -0.22%, 95% CI: -1.84 to 1.40%), excluding the predefined non-inferiority margin of -2.29%. Changes in both CTX and P1NP over time did not significantly differ between the groups. There was no significant difference in the frequency of adverse events between the groups. Conclusion: Weekly liquid alendronate sodium trihydrate demonstrated non-inferiority to weekly tablet alendronate sodium in increasing LS BMD in Korean postmenopausal women with osteoporosis. Presentation: 6/2/2024
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