Affiliation:
1. Department of Pharmaceutics, Faculty of Pharmacy, University of Utrecht, The Netherlands
2. Department of Medical Parasitology, University of Nijmegen, The Netherlands
Abstract
Abstract
The efficacy of artelinic acid and artemisinin, orally administered at 10 and 50 mg kg−1 day−1, was compared in Plasmodium berghei infected mice. Subsequently, the pharmacokinetics of artelinic acid after intravenous, intramuscular, oral and rectal administration of a 20 mg kg−1 aqueous solution to rabbits were studied in a four-way randomized cross-over experiment. After intravenous administration, artelinic acid concentrations in blood plasma were high (C0: 76 ± 15 mg L−1), and the drug was rapidly eliminated from the central compartment, showing linear elimination kinetics with an elimination half-life of 15 ± 3 min. A large inter-subject variation appeared in the absorption rate and the extent of absorption (2–92%) over the 120 min interval after intramuscular administration. Also, a large inter-subject variation in individual rectal bioavailability (17–100%) was shown, which was dependent on the site of absorption in the rectum. The estimated oral bioavailability was low (4·6 ± 1·7%), probably due to a high first-pass effect and possible decomposition in the acidic gastric environment.
Publisher
Oxford University Press (OUP)
Subject
Pharmaceutical Science,Pharmacology
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