Inhibition and enhancement of the noradrenaline constrictor response by methylxanthines.
D000818:Animals; D002110:Caffeine / Q000494:pharmacology*; D000242:Cyclic AMP; D004285:Dogs; D004305:Dose-Response Relationship, Drug; D004357:Drug Synergism; D008638:Mesenteric Arteries / Q000187:drug effects; D009638:Norepinephrine / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D010477:Perfusion; D010726:Phosphodiesterase Inhibitors; D013805:Theobromine / Q000494:pharmacology*; D013806:Theophylline / Q000494:pharmacology*
D010726:Phosphodiesterase Inhibitors; D002110:Caffeine; D013806:Theophylline; D000242:Cyclic AMP; D013805:Theobromine; D009638:Norepinephrine