(R)-(+)-Aminoglutethimide (5, 50 mg/kg; p.o.) is excreted from urine and feces within 48 hr, mainly in the form of metabolites [2]. (R)-(+)-Aminoglutethimide (1, 10, 50 mg/kg; i.p.; 60 min before training) dose not induce any significant effect in 1 and 10 mg/kg, induces a loss of retention at 50 mg/kg in day-old chicks [3].