Figure 3.

Effects of ramelteon on latency to sleep onset in freely moving monkeys. Each value shows the mean latency ± SE to each light sleep (LS) and SWS at doses of 0.003 (A), 0.03 (B), and 0.3 mg/kg, p.o. (C). Six monkeys were used in each group. *P ≤ 0.05, **P ≤ 0.01, compared with vehicle‐treated controls [paired t test with Holm correction, 103].