title: The contractile effect of phentolamine on the smooth muscle of isolated guinea pig urinary bladder.
mesh_terms: D000818:Animals; D004347:Drug Interactions; D006168:Guinea Pigs; D066298:In Vitro Techniques; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects*; D010646:Phentolamine / Q000494:pharmacology*; D011188:Potassium / Q000494:pharmacology; D001743:Urinary Bladder / Q000187:drug effects*
chemical_list: D011188:Potassium; D010646:Phentolamine