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Updated: Jun 11, 2026

Use of Micropipette-Guided Drug Administration as an Alternative Method to Oral Gavage in Rodent Models
02:44

Use of Micropipette-Guided Drug Administration as an Alternative Method to Oral Gavage in Rodent Models

Published on: July 26, 2024

Alternative method of oral dosing for rats.

Zeenat Atcha1, Claire Rourke, Aveline Hp Neo

  • 1Centre for Cognition and Neurodegeneration, GlaxoSmithKline R&D China, Singapore. zeenatatcha@hotmail.com

Journal of the American Association for Laboratory Animal Science : JAALAS
|July 1, 2010
PubMed
Summary

A novel syringe-feeding method offers a less distressing alternative for oral drug administration in rats. This technique effectively delivers Alzheimer's disease medications like donepezil and galantamine, showing promise for improved drug delivery and cognitive benefits.

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Area of Science:

  • Pharmacology
  • Animal Models
  • Drug Delivery

Background:

  • Oral drug administration in rodents commonly uses gavage, which can cause esophageal injury and distress.
  • Alternative methods are needed to reduce morbidity and distress associated with traditional gavage techniques.

Purpose of the Study:

  • To evaluate syringe feeding as an alternative oral dosing method in rats.
  • To compare the palatability and pharmacokinetics of donepezil and galantamine via syringe feeding versus gavage.
  • To assess the impact of syringe feeding on cognitive performance in a novel object recognition test.

Main Methods:

  • Male Lister hooded rats were administered donepezil, galantamine, or nicotine via syringe feeding or traditional gavage.
  • Palatability was assessed by measuring voluntary intake from a syringe containing sucrose.

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  • Pharmacokinetic profiles and cognitive performance (novel object recognition test) were evaluated for each administration method.

    • Main Results:

    • Rats readily learned to drink voluntarily from the syringe, with decreasing latency.
    • Nicotine addition to sucrose resulted in aversive effects, inhibiting intake.
    • Syringe feeding improved oral bioavailability of donepezil but not galantamine.
    • Both donepezil and galantamine improved cognitive performance similarly across both administration methods.

    Conclusions:

    • Syringe feeding is a viable and effective alternative oral dosing method in rats.
    • This technique can reduce distress and potential injury compared to gavage.
    • Syringe feeding demonstrates potential for enhanced oral bioavailability of certain drugs and maintains therapeutic efficacy.