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A new screening method for evaluating antitussives in conscious guinea pigs
Journal of Pharmacobio-Dynamics
|December 1, 1982
Summary
A novel method using electrical stimulation in guinea pigs effectively induces cough reflexes. This new technique requires significantly lower antitussive doses (AtD50) for screening cough suppressant drugs.
Area of Science:
- Pharmacology
- Preclinical Research
Background:
- Evaluating antitussive agents requires reliable methods to induce cough reflexes.
- Existing methods may require larger drug quantities for screening.
Purpose of the Study:
- To develop and validate a new, efficient method for inducing cough reflex in guinea pigs.
- To assess the efficacy of this method for screening antitussive drugs.
Main Methods:
- A non-anesthetized guinea pig model was used.
- Electrical stimulation (40 Hz, 5s square-wave pulse) was applied to the tracheal mucosa via a puncture electrode.
- Fifty percent antitussive doses (AtD50) for codeine, morphine, picoperidamine, benproperine, and fominoben were determined.
Main Results:
- The new method successfully induced cough reflexes in guinea pigs.
- The determined AtD50 values were substantially lower compared to other established methods.
- Specific AtD50 values for tested drugs via intraperitoneal and oral routes were quantified.
Conclusions:
- The developed electrical stimulation method is a highly sensitive and efficient tool for inducing cough reflexes in guinea pigs.
- This method is suitable for the initial screening of antitussive agents, particularly when material is limited.
