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Comparative pharmacokinetics of zolpidem tartrate in five ethnic populations of China.

Guo T, Mao G, Zhao L, Xia D, Yang L - Acta Pharm Sin B (2014)

Bottom Line: However, there were statistically significant differences between males and females for the pharmacokinetic parameters (P<0.05).Results indicate that ethnicity has no significant impact on the pharmacokinetics of zolpidem tatrate after a single oral dose in healthy Chinese subjects.However, an effect of gender on the pharmacokinetics of zolpidem tatrate can be noted.

View Article: PubMed Central - PubMed

Affiliation: Department of Pharmacy, Shenyang Northern Hospital, Shenyang 110840, China.

ABSTRACT
The objective of this study was to evaluate the difference in the pharmacokinetics of zolpidem tatrate in subjects from five Chinese ethnicities (Han, Mongolian, Uigur, Korean and Hui). Healthy subjects (10 Hans, 10 Mongolians, 10 Uigurs, 10 Koreans and 9 Huis) were recruited and each received a 10 mg tablet-dose of zolpidem tatrate. A total of 12 plasma samples were collected over a 12 h period after administration. The concentrations of zolpidem in plasma were determined by an HPLC-FLU method, after which the pharmacokinetic parameters were determined using DAS 2.0 software and analyzed by SPSS 16.0 software. After normalization by weight, no differences were noted in the pharmacokinetic parameters of zolpidem tatrate among the five ethnic groups (P>0.05). However, there were statistically significant differences between males and females for the pharmacokinetic parameters (P<0.05). The metabolism of zolpidem tatrate in males was faster than in females. Results indicate that ethnicity has no significant impact on the pharmacokinetics of zolpidem tatrate after a single oral dose in healthy Chinese subjects. However, an effect of gender on the pharmacokinetics of zolpidem tatrate can be noted.

No MeSH data available.


HPLC chromatograms of zolpidem tatrate in plasma. A: a blank plasma sample; B: a blank plasma sample spiked with IS and zolpidem tatrate and; C: a volunteer plasma sample. 1: alfuzosin hydrochloride (internal standard); 2: zolpidem tatrate.
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f0005: HPLC chromatograms of zolpidem tatrate in plasma. A: a blank plasma sample; B: a blank plasma sample spiked with IS and zolpidem tatrate and; C: a volunteer plasma sample. 1: alfuzosin hydrochloride (internal standard); 2: zolpidem tatrate.

Mentions: The regression equation for zolpidem concentration was described as: y=–0.022+0.041x (r=0.9994), where y means the plasma concentration of zolpidem, and x mean the ratio of peak area of zolpidem to that of internal standard. The calibration curve was in good linearity within the range of 2.0–250.0 ng/mL with inter- and inter-day relative standard deviations of less than 8.8%. The retention times of zolpidem and internal standard were 9.3 and 5.3 min, respectively (Fig. 1).


Comparative pharmacokinetics of zolpidem tartrate in five ethnic populations of China.

Guo T, Mao G, Zhao L, Xia D, Yang L - Acta Pharm Sin B (2014)

HPLC chromatograms of zolpidem tatrate in plasma. A: a blank plasma sample; B: a blank plasma sample spiked with IS and zolpidem tatrate and; C: a volunteer plasma sample. 1: alfuzosin hydrochloride (internal standard); 2: zolpidem tatrate.
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4590726&req=5

f0005: HPLC chromatograms of zolpidem tatrate in plasma. A: a blank plasma sample; B: a blank plasma sample spiked with IS and zolpidem tatrate and; C: a volunteer plasma sample. 1: alfuzosin hydrochloride (internal standard); 2: zolpidem tatrate.
Mentions: The regression equation for zolpidem concentration was described as: y=–0.022+0.041x (r=0.9994), where y means the plasma concentration of zolpidem, and x mean the ratio of peak area of zolpidem to that of internal standard. The calibration curve was in good linearity within the range of 2.0–250.0 ng/mL with inter- and inter-day relative standard deviations of less than 8.8%. The retention times of zolpidem and internal standard were 9.3 and 5.3 min, respectively (Fig. 1).

Bottom Line: However, there were statistically significant differences between males and females for the pharmacokinetic parameters (P<0.05).Results indicate that ethnicity has no significant impact on the pharmacokinetics of zolpidem tatrate after a single oral dose in healthy Chinese subjects.However, an effect of gender on the pharmacokinetics of zolpidem tatrate can be noted.

View Article: PubMed Central - PubMed

Affiliation: Department of Pharmacy, Shenyang Northern Hospital, Shenyang 110840, China.

ABSTRACT
The objective of this study was to evaluate the difference in the pharmacokinetics of zolpidem tatrate in subjects from five Chinese ethnicities (Han, Mongolian, Uigur, Korean and Hui). Healthy subjects (10 Hans, 10 Mongolians, 10 Uigurs, 10 Koreans and 9 Huis) were recruited and each received a 10 mg tablet-dose of zolpidem tatrate. A total of 12 plasma samples were collected over a 12 h period after administration. The concentrations of zolpidem in plasma were determined by an HPLC-FLU method, after which the pharmacokinetic parameters were determined using DAS 2.0 software and analyzed by SPSS 16.0 software. After normalization by weight, no differences were noted in the pharmacokinetic parameters of zolpidem tatrate among the five ethnic groups (P>0.05). However, there were statistically significant differences between males and females for the pharmacokinetic parameters (P<0.05). The metabolism of zolpidem tatrate in males was faster than in females. Results indicate that ethnicity has no significant impact on the pharmacokinetics of zolpidem tatrate after a single oral dose in healthy Chinese subjects. However, an effect of gender on the pharmacokinetics of zolpidem tatrate can be noted.

No MeSH data available.