国产和进口口服钙制剂对体内钙水平影响的比较

 目的：比较国产和进口的3种口服补钙剂对健康志愿者的生物等效性。方法：10名健康志愿者随机4组交叉，不服药或po单剂量1000mg元素钙的补钙剂后，采集测定8h内的血清钙浓度和24h内的尿钙浓度。结果：空白和服用制剂A，B，C后的血清药-时曲线下面积AUC_0h～8h分别为(674.2±49.08)mg·h·L^-1,(728.7±42.47)mg·h·L^-1，(717.5±51.34)mg·h·L^-1，(697.3±52.73)mg·h·L^-1；0h～4h和0h～24h尿钙排泄量分别为(13.06±9.88)mg，(65.20±24.97)mg；(34.07±17.67)mg，(138.25±57.35)mg；(34.11±25.97)mg，(147.41±85.79)mg，(25.77±12.49)mg，(99.37±48.20)mg。结论：经统计学判定，本方法检测可见，服用制剂A，B，C后血钙浓度和尿钙排量与不服药组有明显差异，但3种制剂间无显著性差异。表明国产和进口的钙制剂对体内钙行为的影响是一致的。

Comparative study in calcium levels of calcium supplements in healthy volunteers

OBJECTIVE: To investigate the changes of calcium in serum and urine after oral administered different brands of calcium supplement in healthy volunteers. METHODS: In a randomized four-way crossover study, the serum and urine concentration-time profiles were determined after no dosing and po 1 000 mg of calcium single dose of preparation A, B and C. RESULTS: The AUC_0h～8h of blank serum, preparation A, B and C were (674.2±49.08)mg·h·L^-1, (728.7±42.47)mg·h·L^-1, (717.5±51.34)mg·h·L^-1, (697.3±52.73)mg·h·L^-1 , respectively. The urinary output in 0 h～4 h and 0 h～24 h hours of blank, preparation A, B and C were (13.06±9.88)mg and (65.20±24.97)mg, (34.07±17.67)mg and (138.25±57.35)mg, (34.11±25.97)mg and (147.41±85.79)mg, (25.77±12.49)mg and (99.37±48.20)mg, respectively. CONCLUSION: The statistical analysis for the parameters showed that there was significant difference between each calcium supplement and blank serum or urine (P<0.01), but there was no significant difference between preparation A, B and C (P>0.05).