title: Ketanserin and pirenperone attenuate acute morphine withdrawal in rats.
abstract: The involvement of serotonin2 (5-HT2) receptors in the expression of opiate withdrawal was examined using a behavioral test for acute morphine dependence. The 5-HT2 antagonists, ketanserin and pirenperone, injected shortly before naloxone, attenuated the naloxone-induced suppression of an autoshaped lever-touch response in rats treated 4 h earlier with a moderate dose of morphine. A low dose of pirenperone was also effective in blocking withdrawal-induced hypothermia. These data support the hypothesis that 5-HT is involved in the expression of opiate withdrawal.
mesh_terms: D000818:Animals; D001831:Body Temperature / Q000187:drug effects; D003216:Conditioning, Operant / Q000187:drug effects; D007650:Ketanserin / Q000494:pharmacology*; D008297:Male; D009021:Morphine Dependence / Q000523:psychology*; D010880:Piperidines / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D013375:Substance Withdrawal Syndrome / Q000517:prevention & control*
chemical_list: D010880:Piperidines; D007650:Ketanserin; C034177:pirenperone