{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T09:47:11Z","timestamp":1791107231678,"version":"4.1.0"},"reference-count":41,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2009,3,3]],"date-time":"2009-03-03T00:00:00Z","timestamp":1236038400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biopharm &amp; Drug Disp"],"published-print":{"date-parts":[[2009,4]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The aim of this study was to characterize the pharmacokinetics and pharmacodynamics of morphine and morphine 6\u2010glucuronide (M6G) in children with cancer.<\/jats:p><jats:p>Serum concentrations of morphine and M6G in children who received single oral or short term continuous intravenous morphine were determined by HPLC and ELISA assays, respectively.<\/jats:p><jats:p>The serum<jats:italic>C<\/jats:italic><jats:sub>max<\/jats:sub>of morphine and M6G after i.v. morphine administration was 560.5 and 309.0\u2009n<jats:sc>M<\/jats:sc>and the<jats:italic>T<\/jats:italic><jats:sub>max<\/jats:sub>was 61 and 65\u2009min, respectively. The elimination half\u2010life was 140.0 and 328.7\u2009min, respectively. After oral administration of morphine, the serum<jats:italic>C<\/jats:italic><jats:sub>max<\/jats:sub>of morphine and M6G was 408.34 and 256.3\u2009n<jats:sc>M<\/jats:sc>and the<jats:italic>T<\/jats:italic><jats:sub>max<\/jats:sub>was 40.0 and 60\u2009min, respectively. The half\u2010life was 131.0 and 325.8\u2009min, respectively. The side effects were: drowsiness (100%), nausea and\/or vomiting (57%), pruritus (28%) and urinary retention (14%). There were no reports of respiratory complications.<\/jats:p><jats:p>This study showed that pharmacokinetics factors of morphine and M6G in children were significantly different from adults. Therefore the required dose for children should be different from that of adults and should be based on studies performed on children rather than on studies on adults. Some adverse effects, particularly nausea and pruritus, may be commoner than is usually thought, while others, particularly respiratory problems did not occur. 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