ZHONG Ling,QIU Yan-chuan,SHANG Jing-chuan.Determination of droxidopa in human plasma and pharmacokinetic features[J].J Amry Med Univ (J Third Mil Med Univ),2009,31(11):1112-1114.
ZHONG Ling,QIU Yan-chuan,SHANG Jing-chuan.Determination of droxidopa in human plasma and pharmacokinetic features[J].J Amry Med Univ (J Third Mil Med Univ),2009,31(11):1112-1114.DOI:
Determination of droxidopa in human plasma and pharmacokinetic features
Objective To propose a method for the determination of droxidopa concentration in human plasma by HPLC method for the study of the pharmacokinetics of droxidopa. Methods After a single oral dose of 200 mg droxidopa capsule was administered to 12 healthy Chinese male volunteers
we used perchloric acid to precipitate proteinum and then determined the droxidopa concentration in plasma by HPLC. The pharmacokinetic parameters of droxidopa were calculated by 3P87 software. Results The linear range was 0.025-2 μg/ml. Pharmacokinetic parameters were: T
1/2
(108.50±30.78)min
AUC (185.74±26.41) μg·ml
-1
·min
-1
CL (1.08±0.08)ml/
min
T
max
(99.90±10.05)min
C
max
(0.74±0.08)μg/ml. At 10 h after administration
droxidopa was eliminated from the blood almost completely. Conclusion The method we proposed is sensitive
reproducible
and easy to operate. Pharmacokinetics of droxidopa in vivo is fitted to two-compartment model.