Abstract
A method for pharmacologic and toxicologic investigation of operant responses during inhalation exposure has been developed. The method was tested with rats. Toluene was utilized as a reference chemical. Toluene has been reported to cause significant increases in response rates of animals responding under operant schedules. A fixed interval schedule (Fl-120 sec) was used. A significant increase in response rate was observed. Thus, the results indicated that the method was reliable and allowed operant schedule data to be obtained. The significance of this method lies in its versatility to allow an integrative study of operant response, inhalation kinetics, and pharmacologic action. Potential practical applications of the method include studies of the actions of drugs and chemicals administered via inhalation exposure.
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