Aim To establish a LC-MS method for determining the concentration of nifedipine in human plasma and to evaluate the pharmacokinetic characteristics of nifedipine sustained-release tablets. Methods A XB-C18 (5 μm, 4....Aim To establish a LC-MS method for determining the concentration of nifedipine in human plasma and to evaluate the pharmacokinetic characteristics of nifedipine sustained-release tablets. Methods A XB-C18 (5 μm, 4.6 mm ×150 mm) column and a mobile phase of methanol: 0.01 mol·L^-1ammonium acetate (60:40, V/V) were used to separate nifedipine, the detections was accuracy under atmosperic pressure electronic spray ionization (AP-ESI) mode and ion mass spectrum (m/z) of 314.9 [M+H]^+ for nifedipine, and 320.8 [M+H]^+ for lorazepam (Internal Standard, IS). Results The linear range of nifedipine was 0.3 - 80 ng·mL^-1 ( r = 0.9997), and the limit of quantitation (LOQ) was 0.3 ng·mL^-1. The nifedipine pharmacokinetic parameters after a single dose of 20 mg nifedipine sustained-release tablets test (T) or reference (R) were as the followings, t1/2 (6.73 ± 2.00) h and (7.04 ± 2.18) h, Tmax (4.28 ± 0.70) h and (4.48 ± 0.70) h, Cmax(39.66 ± 10.58) ng·mL^-1 and (40.19 ± 10.97) ng·mL^-1, AUC0-36 (391.63 ± 108.55) ng·mL^-1·h and (387.57 ± 121.51) ng·mL^-1·h, and AUC0-∞ (408.28 ± 121.16) ng·mL^-1·h and (406.15 ± 133.13) ng·mL^-1·h. The relative bioavailability of nifedipine sustained-release tablets (test) was (103.02 ± 13.93) %. Conclusion LC-MS method for the determination of concentrations of nifedipine in human plasma was sensitive and accurate, and could be used in nifedipine bioavailability and pharmacokinetic studies.展开更多
目的探讨丹参川芎嗪注射液联合硝苯地平治疗子痫前期的临床疗效。方法选取2021年6月—2022年6月保定市第二中心医院收治的114例子痫前期患者,按随机数字表法分为对照组和治疗组,每组各57例。对照组口服硝苯地平缓释片(Ⅰ),10 mg/次,2次/...目的探讨丹参川芎嗪注射液联合硝苯地平治疗子痫前期的临床疗效。方法选取2021年6月—2022年6月保定市第二中心医院收治的114例子痫前期患者,按随机数字表法分为对照组和治疗组,每组各57例。对照组口服硝苯地平缓释片(Ⅰ),10 mg/次,2次/d。治疗组在对照组基础上静脉滴注丹参川芎嗪注射液,每次10 mL加入250mL生理盐水中充分稀释后给药,1次/d。两组均连续治疗5 d。观察两组的临床疗效,比较治疗前后两组24 h尿蛋白定量(24 h UTP)和血压[收缩压(SBP)、舒张压(DBP)]水平,凝血功能指标及血清妊娠相关血浆蛋白A(PAPP-A)、白细胞介素-12(IL-12)、基质细胞衍生因子1(SDF-1)、内皮素-1(ET-1)水平。统计两组不良妊娠结局及药物不良反应情况。结果治疗后,治疗组总有效率是94.74%,显著高于对照组的82.46%(P<0.05)。治疗后,两组24 h UTP、SBP、DBP水平均较治疗前显著降低(P<0.05);治疗后,治疗组24 h UTP、SBP、DBP低于对照组(P<0.05)。治疗后,两组APTT、PT均较治疗前显著延长,而FIB、D-D水平均较治疗前显著降低(P<0.05);治疗后,治疗组患者APTT、PT高于对照组,FIB、D-D水平低于对照组(P<0.05)。治疗后,两组血清PAPP-A、SDF-1水平均显著上升,血清IL-12、ET-1水平均显著下降(P<0.05);均以治疗组改善更显著(P<0.05)。治疗组剖宫产、产后出血、低体质量儿的发生率分别是49.12%、1.75%、3.51%,均显著低于对照组的68.42%、14.04%、14.04%(P<0.05);治疗组新生儿窘迫、窒息的发生率是1.75%、1.75%,均较对照组(7.02%、3.51%)有所降低,但两组比较差异无统计学意义。治疗后,治疗组和对照组不良反应发生率分别是5.26%、3.51%,两组比较差异无统计学意义。结论丹参川芎嗪注射液联合硝苯地平治疗子痫前期具有较为满意的整体疗效,能有效降低患者尿蛋白和血压水平,纠正凝血功能异常,缓解机体炎性损伤,保护血管内皮,改善母婴妊娠结局,且安全性好。展开更多
文摘Aim To establish a LC-MS method for determining the concentration of nifedipine in human plasma and to evaluate the pharmacokinetic characteristics of nifedipine sustained-release tablets. Methods A XB-C18 (5 μm, 4.6 mm ×150 mm) column and a mobile phase of methanol: 0.01 mol·L^-1ammonium acetate (60:40, V/V) were used to separate nifedipine, the detections was accuracy under atmosperic pressure electronic spray ionization (AP-ESI) mode and ion mass spectrum (m/z) of 314.9 [M+H]^+ for nifedipine, and 320.8 [M+H]^+ for lorazepam (Internal Standard, IS). Results The linear range of nifedipine was 0.3 - 80 ng·mL^-1 ( r = 0.9997), and the limit of quantitation (LOQ) was 0.3 ng·mL^-1. The nifedipine pharmacokinetic parameters after a single dose of 20 mg nifedipine sustained-release tablets test (T) or reference (R) were as the followings, t1/2 (6.73 ± 2.00) h and (7.04 ± 2.18) h, Tmax (4.28 ± 0.70) h and (4.48 ± 0.70) h, Cmax(39.66 ± 10.58) ng·mL^-1 and (40.19 ± 10.97) ng·mL^-1, AUC0-36 (391.63 ± 108.55) ng·mL^-1·h and (387.57 ± 121.51) ng·mL^-1·h, and AUC0-∞ (408.28 ± 121.16) ng·mL^-1·h and (406.15 ± 133.13) ng·mL^-1·h. The relative bioavailability of nifedipine sustained-release tablets (test) was (103.02 ± 13.93) %. Conclusion LC-MS method for the determination of concentrations of nifedipine in human plasma was sensitive and accurate, and could be used in nifedipine bioavailability and pharmacokinetic studies.
文摘目的探讨丹参川芎嗪注射液联合硝苯地平治疗子痫前期的临床疗效。方法选取2021年6月—2022年6月保定市第二中心医院收治的114例子痫前期患者,按随机数字表法分为对照组和治疗组,每组各57例。对照组口服硝苯地平缓释片(Ⅰ),10 mg/次,2次/d。治疗组在对照组基础上静脉滴注丹参川芎嗪注射液,每次10 mL加入250mL生理盐水中充分稀释后给药,1次/d。两组均连续治疗5 d。观察两组的临床疗效,比较治疗前后两组24 h尿蛋白定量(24 h UTP)和血压[收缩压(SBP)、舒张压(DBP)]水平,凝血功能指标及血清妊娠相关血浆蛋白A(PAPP-A)、白细胞介素-12(IL-12)、基质细胞衍生因子1(SDF-1)、内皮素-1(ET-1)水平。统计两组不良妊娠结局及药物不良反应情况。结果治疗后,治疗组总有效率是94.74%,显著高于对照组的82.46%(P<0.05)。治疗后,两组24 h UTP、SBP、DBP水平均较治疗前显著降低(P<0.05);治疗后,治疗组24 h UTP、SBP、DBP低于对照组(P<0.05)。治疗后,两组APTT、PT均较治疗前显著延长,而FIB、D-D水平均较治疗前显著降低(P<0.05);治疗后,治疗组患者APTT、PT高于对照组,FIB、D-D水平低于对照组(P<0.05)。治疗后,两组血清PAPP-A、SDF-1水平均显著上升,血清IL-12、ET-1水平均显著下降(P<0.05);均以治疗组改善更显著(P<0.05)。治疗组剖宫产、产后出血、低体质量儿的发生率分别是49.12%、1.75%、3.51%,均显著低于对照组的68.42%、14.04%、14.04%(P<0.05);治疗组新生儿窘迫、窒息的发生率是1.75%、1.75%,均较对照组(7.02%、3.51%)有所降低,但两组比较差异无统计学意义。治疗后,治疗组和对照组不良反应发生率分别是5.26%、3.51%,两组比较差异无统计学意义。结论丹参川芎嗪注射液联合硝苯地平治疗子痫前期具有较为满意的整体疗效,能有效降低患者尿蛋白和血压水平,纠正凝血功能异常,缓解机体炎性损伤,保护血管内皮,改善母婴妊娠结局,且安全性好。