title: Cyclic nucleotides and contraction/relaxation in airway muscle: H1 and H2 agonists and antagonists.
mesh_terms: D000818:Animals; D002927:Cimetidine / Q000494:pharmacology; D000242:Cyclic AMP / Q000032:analysis*; D006152:Cyclic GMP / Q000032:analysis*; D005021:Ethylamines / Q000494:pharmacology; D005260:Female; D006168:Guinea Pigs; D006632:Histamine / Q000494:pharmacology*; D006633:Histamine Antagonists / Q000494:pharmacology*; D066298:In Vitro Techniques; D007213:Indomethacin / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects; D009126:Muscle Relaxation / Q000187:drug effects; D011968:Receptors, Histamine / Q000187:drug effects*; D011969:Receptors, Histamine H1 / Q000187:drug effects*; D011970:Receptors, Histamine H2 / Q000187:drug effects*; D012137:Respiratory System / Q000032:analysis / Q000187:drug effects*
chemical_list: D005021:Ethylamines; D006633:Histamine Antagonists; D011968:Receptors, Histamine; D011969:Receptors, Histamine H1; D011970:Receptors, Histamine H2; D002927:Cimetidine; D006632:Histamine; D000242:Cyclic AMP; D006152:Cyclic GMP; D007213:Indomethacin