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Pharmacokinetics of anticancer drugs in children.

Authors
  • Crom, W R
  • Glynn-Barnhart, A M
  • Rodman, J H
  • Teresi, M E
  • Kavanagh, R E
  • Christensen, M L
  • Relling, M V
  • Evans, W E
Type
Published Article
Journal
Clinical pharmacokinetics
Publication Date
Mar 01, 1987
Volume
12
Issue
3
Pages
168–213
Identifiers
PMID: 3555940
Source
Medline
License
Unknown

Abstract

Interpatient pharmacokinetic variability normally observed in adults is often of even greater magnitude in paediatric patients because of age-related maturation of physiological processes responsible for drug disposition. Several antineoplastic agents have shown age-related changes, including alterations in volume of distribution, hepatic (doxorubicin, cyclophosphamide), and renal (bleomycin, methotrexate) clearances. These differences in pharmacokinetics as a function of age alter systemic exposure to chemotherapy, and may alter the efficacy and toxicity profile for standard doses of antineoplastic drugs. The relationship of systemic exposure to toxicity has been most clearly defined for methotrexate. Clinical monitoring of methotrexate serum concentrations, and adjustment of folinic acid dosages and duration of rescue based on methotrexate disposition is now routine. More recently, pharmacodynamic data have been published for high-dose methotrexate, epipodophyllotoxins, cisplatin, and cytarabine (cytosine arabinoside), indicating a relation between drug disposition and toxicity or efficacy. Collectively, these data suggest that the pharmacokinetics of many anticancer drugs in children is different from adults, and that variability in drug disposition may have an important influence on toxicity or efficacy.

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