Morphine sensitization as a model of mania: Comparative study of the effects of repeated lithium or carbamazepine administration

► Morphine-sensitized rats show stress resilience that mimics a mania-like condition. ► In control rats carbamazepine, but not lithium, elicited an anhedonia-like condition. ► Repeated carbamazepine abolished stress resilience in morphine-sensitized rats. ► Carbamazepine did not affect the responses to palatable food in sensitized rats. ► Lithium did not affect the responses to palatable food in sensitized rats.