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A new dosing regimen for metronidazole in malnourished children


, : A new dosing regimen for metronidazole in malnourished children. Scandinavian Journal of Infectious Diseases 25(1): 115-121

The use of metronidazole for the treatment of intestinal parasitosis has increased markedly, particularly in developing countries, where the association of malnutrition and parasitosis is very common. Since biotransformation of metronidazole is significantly affected by severe malnutrition, and undesirable effects of the drug seem to be related to its plasma concentration, it was decided to carry out a study to establish a dosing-regimen of metronidazole in severely malnourished children. A single dose of 30 mg/kg body weight, and computer simulation of a steady-state was studied in 10 malnourished and in 10 patients undergoing nutritional rehabilitation. Due to ethical considerations (refusal of parents to allow a second dose of metronidazole) acute malnourished children and rehabilitated patients are 2 distinct groups. The results indicate that a predicted drug cumulation would occur in malnourished children with the ordinary dosage regimen (30 mg/kg/day). Based on the clearance data, daily maintenance doses for pediatric patients with severe malnutrition should be 12.0 mg/kg/day, corresponding to a 60% reduction of the common dose calculated to achieve and maintain a plasma concentration of 6.0 micrograms/ml of metronidazole. The study illustrates the need for pharmacokinetic data to establish the individual dose of a drug particularly under conditions that alter biotransformation processes.

US$19.90

PMID: 8460335

DOI: 10.1080/00365549309169679


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