Figure 4.
Effects of varenicline (left) and cytisine (right) in monkeys discriminating nicotine (1.78 mg·kg−1) without additional nicotine treatment (i.e. Intermittent) or while receiving 8.9 mg·kg−1·day−1 of nicotine (i.e. Daily). Abscissae: saline (Sal) or dose in mg·kg−1 body weight administered s.c. Ordinates: mean (± SEM) percentage of responding on the nicotine lever (top) and mean (± SEM) rate of responding expressed as a percentage of control (bottom). Data are the means of five monkeys per group.