title: Receptor sites of action of clonidine: effects of clonidine and three structural isomers on prejunctional and postjunctional alpha-adrenoceptors and histamine H2-receptors in guinea-pig isolated cardiovascular tissues.
mesh_terms: D000818:Animals; D001794:Blood Pressure / Q000187:drug effects; D002319:Cardiovascular System / Q000187:drug effects*; D003000:Clonidine / Q000494:pharmacology*; D006168:Guinea Pigs; D006339:Heart Rate / Q000187:drug effects; D006632:Histamine / Q000494:pharmacology; D066298:In Vitro Techniques; D007536:Isomerism; D009131:Muscle, Smooth, Vascular / Q000187:drug effects; D009469:Neuromuscular Junction / Q000187:drug effects; D011941:Receptors, Adrenergic / Q000187:drug effects*; D011942:Receptors, Adrenergic, alpha / Q000187:drug effects*; D011968:Receptors, Histamine / Q000187:drug effects*; D011970:Receptors, Histamine H2 / Q000187:drug effects*
chemical_list: D011941:Receptors, Adrenergic; D011942:Receptors, Adrenergic, alpha; D011968:Receptors, Histamine; D011970:Receptors, Histamine H2; D006632:Histamine; D003000:Clonidine