PMID: 8965152May 1, 1996Paper

Opioid and opioid-like drug effects on whole-gut transit measured by scintigraphy

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
A H MaurerK Brown

Abstract

We studied the effects of several drugs on gastrointestinal transit (tramadol HCl, acetaminophen with codeine and placebo) in a randomized, double-blind, crossover study. Combined gastric emptying, small bowel and colonic transit scintigraphy was performed in 12 normal subjects. Each subject received a standardized diet and study drug on Days 1-5. On Day three, subjects received a radiolabeled solid and liquid phase meal. No significant difference in the gastric T1/2 (mean +/- s.e.m.) of solids for placebo (69 +/- 7 min), APAP/C (74 +/- 15 min) or tramadol (686 +/- 8 min) (p = 0.86) were seen. Similarly there was no significant difference in the T1/2 of liquids for placebo (31 +/- 4 min), APAP/C (41 +/- 6 min) (p = 0.29). Orocecal transit times were not significantly different for placebo (237 +/- 20 min), APAP/C (311 +/- 26 min) or tramadol (311 +/- 10 min) (p = 0.12). Colon geometric centers (GC) for placebo at 24, 48 and 72 hr were 4.6 +/- 0.35, 6.0 +/- 0.28 and 6.8 +/- 0.08. The GC for tramadol and APAP/C were all significantly lower at 72 hr, 6.4 +/- 0.17 and 6.2 +/- 0.17, respectively compared to the placebo. The GC of tramadol at 24 and 48 hr (3.8 +/- 0.4, 5.4 +/- 0.26) were not significantly different from placebo. In c...Continue Reading

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