Analysis of formulation and food effect on the absorption of metoclopramide.
OBJECTIVE
Assessment of the relative and absolute bioavailability of immediate release and sustained release formulations of metoclopramide. Assessment of the effect of a high-fat meal on the pharmacokinetics of sustained release metoclopramide.


METHODS
In a balanced 4-way crossover study in 16 healthy male volunteers, a sustained release (SR) formulation of metoclopramide was compared with a solution for injection (A) and an immediate release tablet (B). The SR formulation was administered after a fasting period (C) as well as after a high-fat meal (D). A single dose of 30 mg metoclopramide was investigated in each treatment. Metoclopramide concentrations were determined by HPLC.


RESULTS
The absolute bioavailability of the sustained release formulation (fasting state) was 58% and thus about 17% lower than the bioavailability of the immediate release formulation. Comparing the treatments C (sustained release, fasting state) and D (sustained release, high-fat meal) no significant influence of food on the absorption of sustained release metoclopramide could be detected.
Vergin
H
H
Medical Affairs Arthritis/MDI, Pharmacia GmbH, Erlangen, Germany. hartmut.vergin@pharmacia.com
Fisch
U
U
Mahr
G
G
Winterhalter
B
B
D000042:Absorption; D000284:Administration, Oral; D000328:Adult; D001682:Biological Availability; D002851:Chromatography, High Pressure Liquid; D018592:Cross-Over Studies; D003692:Delayed-Action Preparations; D004041:Dietary Fats; D018492:Dopamine Antagonists / Q000008:administration & dosage / Q000493:pharmacokinetics*; D004435:Eating; D006801:Humans; D007262:Infusions, Intravenous; D008297:Male; D008787:Metoclopramide / Q000008:administration & dosage / Q000493:pharmacokinetics*
D003692:Delayed-Action Preparations; D004041:Dietary Fats; D018492:Dopamine Antagonists; D008787:Metoclopramide