Abstract:
:The disposition of many drugs in obesity is altered, although little is known of the effect of obesity on the pharmacokinetics of anti-cancer drugs. In this report the authors describe the pharmacokinetics of high-dose methotrexate in an obese woman (184% ideal body weight) with osteosarcoma. For this patient, both the volume of distribution at steady-state (0.398 l/kg) and systemic clearance (0.0956 l/h/kg) of methotrexate were increased compared with values observed in adult patients with osteosarcoma. The terminal elimination half-life (9.29 hours) of methotrexate was similar to other reported values in adult patients, thus indicating that increases in methotrexate volume of distribution and clearance may offset each other in obesity. Based on the experience gained from this patient, the authors suggest that renal function and methotrexate serum concentrations should be monitored in obese patients receiving high-dose methotrexate with leucovorin rescue.
journal_name
Cancerjournal_title
Cancerauthors
Fleming RA,Eldridge RM,Johnson CE,Stewart CFdoi
10.1002/1097-0142(19910915)68:6<1247::aid-cncr2820subject
Has Abstractpub_date
1991-09-15 00:00:00pages
1247-50issue
6eissn
0008-543Xissn
1097-0142journal_volume
68pub_type
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