title: Effects of abrupt and gradual withdrawal from long-term haloperidol treatment on open field behavior of rats.
abstract: The effects of abrupt and gradual withdrawal from long-term haloperidol treatment on rat open field behavior was studied. Abrupt withdrawal induced a significant increase in all parameters of activity observed except defecation, this increase being higher 72 h after the last haloperidol injection. Results were considered to be a consequence of supersensitivity of central dopaminergic receptors. These differences were almost unobservable in animals gradually withdrawn, thus suggesting that the phenomenon is reversible.
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000187:drug effects*; D003672:Defecation / Q000187:drug effects; D006120:Grooming; D006220:Haloperidol / Q000008:administration & dosage / Q000494:pharmacology*; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000187:drug effects; D051381:Rats; D013375:Substance Withdrawal Syndrome / Q000523:psychology*; D013997:Time Factors
chemical_list: D006220:Haloperidol