Oral bioavailability of high-dose metoclopramide.
The oral bioavailability of high-dose metoclopramide was studied in 12 patients, who received oral or intravenous (i.v.) metoclopramide in random order with each of 2 consecutive courses of cytotoxic chemotherapy. The terminal half-life of metoclopramide was 7.1 +/- 0.4 h (mean +/- SEM) and was not affected by the route of drug administration. Mean bioavailability was 86.6 +/- 4.7% and the range (65-118%) was less than that reported for standard doses. Neither half-life nor bioavailability was significantly correlated with age. Adverse effects were mild and were similar for both oral and iv metoclopramide. Oral high-dose metoclopramide, given in the same doses as for i.v. administration, should therefore be as effective as the i.v. regimen and may be easier to administer.
D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000009:adverse effects; D001682:Biological Availability; D006207:Half-Life; D006801:Humans; D007700:Kinetics; D008787:Metoclopramide / Q000008:administration & dosage / Q000378:metabolism* / Q000627:therapeutic use; D008875:Middle Aged; D014839:Vomiting / Q000139:chemically induced / Q000188:drug therapy
D000970:Antineoplastic Agents; D008787:Metoclopramide