Krafft K, Cleary J, Poling A
Psychopharmacology (Berl). 1983;79(1):82-3. doi: 10.1007/BF00433021.
Pigeons trained under a two-key drug discrimination procedure eventually learned to discriminate 5 mg/kg phenytoin from saline injections. When 1.25-20 mg/kg doses of phenytoin were substituted for the training dose, the percentage of responses directed to the phenytoin-appropriate key varied directly with dose. Chlorpromazine, d-amphetamine, diazepam, and phenobarbital failed to produce phenytoin-like patterns of responding.
