Figure1Large.gif (5147 bytes)

 
Figure 1
Effect of SCH23390 (0.1, 0.3, 1, 3, 10
u
g/kg/inj) on self-administration of SKF82958 (3, 10, 30 ug/kg/inj ).  Data are presented as mean total self-injections during 3 hr sessions.  *p<0.05 versus same dose of SKF82958 alone.