The stimulus properties of two common over-the-counter drug mixtures: dextromethorphan + ephedrine and dextromethorphan + diphenhydramine
Journal of Psychopharmacology 1998 D.V. Gauvin, S.A. Vanecek, T.J. Baird et al.
Two groups of rats were trained in a two-choice drug discrimination procedure under a fixed-ratio 10 schedule of food reinforcement. One group of rats ( n=12) was trained to discriminate the presence and absence of a drug mixture containing 10 mg/kg dextromethorphan + 10 mg/kg diphenhydramine. The other group of rats ( n=12) was trained to discriminate the presence and absence of another drug...