title: The effects of theophylline and cyclic AMP on intestinal smooth muscle contractions.
mesh_terms: D000818:Animals; D003106:Colon / Q000187:drug effects*; D000242:Cyclic AMP / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D006168:Guinea Pigs; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects*; D011188:Potassium / Q000037:antagonists & inhibitors / Q000494:pharmacology; D013806:Theophylline / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D013806:Theophylline; D000242:Cyclic AMP; D011188:Potassium