title: Self-administration of clonidine by the rat.
mesh_terms: D000818:Animals; D001376:Azaperone / Q000008:administration & dosage; D003000:Clonidine / Q000008:administration & dosage*; D005283:Fentanyl / Q000008:administration & dosage; D006220:Haloperidol / Q000008:administration & dosage; D007263:Infusions, Parenteral; D008297:Male; D009115:Muridae; D009270:Naloxone / Q000008:administration & dosage; D012055:Reinforcement Schedule; D012646:Self Administration
chemical_list: D001376:Azaperone; D009270:Naloxone; D006220:Haloperidol; D003000:Clonidine; D005283:Fentanyl