Fig. 3.
Antalarmin effects on cocaine intake in ShA and LgA rats under a fixed-ratio schedule. Antalarmin was intraperitoneally injected 80 min before a test session. Test sessions lasted 1 h and were separated by one or two treatment-free escalation sessions. Data are expressed as mean (+SEM) cocaine intake (milligram per kilogram). *p<0.05 compared with the vehicle