title: Dualism in the alpha-adrenoceptor blocking action of dihydroergocristine.
mesh_terms: D000317:Adrenergic alpha-Antagonists; D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004088:Dihydroergotoxine / Q000494:pharmacology*; D066298:In Vitro Techniques; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects*; D009130:Muscle, Smooth / Q000187:drug effects*; D009131:Muscle, Smooth, Vascular / Q000187:drug effects; D009638:Norepinephrine / Q000494:pharmacology; D010208:Papaverine / Q000494:pharmacology; D051381:Rats; D014649:Vas Deferens / Q000187:drug effects
chemical_list: D000317:Adrenergic alpha-Antagonists; D004088:Dihydroergotoxine; D010208:Papaverine; D002118:Calcium; D009638:Norepinephrine