Abstract
Objective
To study the effect of the concomitant consumption of kolanut, a caffeine-containing nut, on the pharmacokinetics of halofantrine.
Methods
A single dose of 500 mg halofantrine hydrochloride was orally administered either alone or concomitant with 12.5 g kolanut to 15 healthy male volunteers in a Latin-square randomized crossover design with a wash-out period of 6 weeks between treatments. Blood samples were collected and analyzed by HPLC for halofantrine and the active metabolite N-desbutylhalofantrine.
Results
Concomitant intake of kolanut with halofantrine significantly decreased Cmax and AUC of both halofantrine and the metabolite desbutylhalofantrine, while no significant effect was observed for t max and t 1/2 of the compounds. In the case of halofantrine, Cmax decreased from 179 ± 119 to 98 ± 32 ng/ml, and the AUC was reduced from 17,450 ± 4,611 to 11,821 ± 4,069 ng·h/ml. Cmax of desbutylhalofantrine decreased from 124 ± 41 to 62 ± 23 ng/ml and the AUC from 13,341 ± 4,749 to 7,359 ± 3,018 ng·h/ml when kolanut was co-administered.
Conclusions
Co-administration of halofantrine and kolanut caused a significant decrease in the plasma concentrations of halofantrine and the active metabolite desbutylhalofantrine probably during adsorption of the drug due to complex formation. This indicates that caution should be exerted when the drug is taken together with caffeine-containing nutrients.
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Abbreviations
- Hf:
-
Halofantrine
- DHf:
-
Desbutylhalofantrine
References
Colwell WT, Brown V, Christie P, Lange J, Reece L, Yanamoko K, Henry DW (1972) Antimalarial arylaminopropanols. J Med Chem 15:771–775
Watkins WM, Lury JD, Kariuki D, Koech DK, Oloo JA, Mosoba M, Mjomba M, Gilles HM (1988) Efficacy of multi-dose halofantrine in the treatment of chloroquine resistant falciparum malaria in children in Kenya. Lancet 332:247–250
Babalola CP, Adegoke AO, Ogunjimi MA, Osimosu MO (2003) Determination of physicochemical properties of halofantrine. African J Med Sci 32:357–359
Milton KA, Edwards G, Ward SA, Orme MLE, Breckenridge AM (1989) Pharmacokinetics of halofantrine in man; effects of food and dose size. Br J Clin Phamacol 28:71–77
Matson PA, Luby SP, Redd SC, Rolka HR, Meriwether RA (1996) Cardiac effects of standard dose halofantrine therapy. Am J Med Hyg 54:229–231
Charbit B, Becyuemont L, Lepere B, Peytavin G, Funck-Brentano C (2002) Pharmacokinetic and pharmacodynamic interaction between grapefruit juice and halofantrine. Clin Pharmacol Ther 72:514–523
Bassi PU, Onyeji CO, Ukponmwan OE (2004) Effects of tetracycline on the pharmacokinetics of halofantrine in healthy volunteers. Brit J Clin Pharmacol 58:152–155
Khoo SM, Porter CJH, Edwards GA, Charman WN (1998) Metabolism of halofantrine to its equipotent metabolite desbutylhalofantrine is decreased when orally administered with ketoconazole. J Pharm Sci 87:1538–1541
Hombhanje FW (2000) Effects of a single oral dose of Fansidar on the pharmacokinetics of halofantrine in healthy volunteers. Brit J Clin Pharmacol 49:283–288
Aideloje SO, Onyeji CO, Ugwu NC (1998) Altered pharmacokinetics of halofantrine by an antacid, magnesium carbonate. Eur J Pharm Biopharm 46:299–303
Morton JF (1992) Widespread tannin intake via stimulants and masticatories, especially guarana, kolanut, betel vine, and accessories. Basic Life Sci 59:739–765
Lim L, Go M (2000) Caffeine and nicotinamide enhances the aqueous solubility of the antimalarial agent halofantrine. Eur J Pharm Sci 10:17–28
Kolade YT, Babalola CP, Scriba GKE (2006) Analysis of the antimalarial drug halofantrine and its major metabolite N-desbutylhalofantrine in human plasma by high performance liquid chromatography. J Pharm Biomed Anal 41:315–319
Somorin O (1973) Spectrophotometric determination of caffeine in Nigerian kola nuts. J Food Sci 38:911–912
Khalil RM (1996) Interaction of ibuprofen and indomethacin with caffeine. Pharmazie 51:970–973
Acknowledgements
The financial support by the German Educational Exchange Services (DAAD) and Senate Research Grant (University of Ibadan, Nigeria) is gratefully acknowledged. The authors thank M. Hense and Dr. A. Adedapo for technical support. All experiments comply with the current laws of Nigeria where the pharmacokinetic experiments were performed.
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Kolade, Y.T., Babalola, C.P., Olaniyi, A.A. et al. Effect of kolanut on the pharmacokinetics of the antimalarial drug halofantrine. Eur J Clin Pharmacol 64, 77–81 (2008). https://doi.org/10.1007/s00228-007-0387-0
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DOI: https://doi.org/10.1007/s00228-007-0387-0