title: The effect of narcotic agonists and antagonists on the rat colon.
mesh_terms: D000818:Animals; D003106:Colon / Q000187:drug effects; D004343:Drug Implants; D006801:Humans; D066298:In Vitro Techniques; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology; D009021:Morphine Dependence / Q000503:physiopathology; D009119:Muscle Contraction / Q000187:drug effects*; D009292:Narcotic Antagonists / Q000494:pharmacology*; D009294:Narcotics / Q000494:pharmacology*; D051381:Rats
chemical_list: D004343:Drug Implants; D009292:Narcotic Antagonists; D009294:Narcotics; D009020:Morphine