Sl. Wong et Gr. Granneman, Modeling of sertindole pharmacokinetic disposition in healthy volunteers in short term dose-escalation studies, J PHARM SCI, 87(12), 1998, pp. 1629-1631
The pharmacokinetics of sertindole were studied in young, healthy volunteer
s after single and multiple oral dose administered under an escalating mann
er. In a low-dose study (study 1), subjects received 4-8 mg with a maintena
nce dose period of 7 days. Ina high-dose study (study 2), subjects received
4 mg daily for 2 days, and the dose was increased by 4 mg increments every
third day until reaching 20 mg daily. The mean terminal t(1/2) was 73 h af
ter the final 8 mg dose in study 1 and 60 h after the 20 mg dose in study 2
. The terminal elimination phase appeared to be monophasic in all the study
subjects, suggesting that Michaelis-Menten saturable metabolism was not in
volved in the elimination of sertindole. Compartmental analyses suggested t
hat the disproportional increase of the C-max and AUC values from 4 mg to 2
0 mg during multiple dosing may be explained by saturable presystemic elimi
nation of sertindole, leading to a higher fraction of sertindole available
for-absorption at higher doses.