title: Primary pulmonary hypertension and oral phentolamine.
mesh_terms: D001794:Blood Pressure / Q000187:drug effects*; D006801:Humans; D006976:Hypertension, Pulmonary / Q000188:drug therapy* / Q000517:prevention & control; D010646:Phentolamine / Q000494:pharmacology / Q000627:therapeutic use*; D005082:Physical Exertion
chemical_list: D010646:Phentolamine