title: Comparison of bronchodilator effects of oral salbutamol and theophylline and their combination with hydroxyzine.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D000420:Albuterol / Q000627:therapeutic use*; D001249:Asthma / Q000188:drug therapy*; D002986:Clinical Trials as Topic; D004311:Double-Blind Method; D004338:Drug Combinations; D006801:Humans; D006919:Hydroxyzine / Q000627:therapeutic use; D008875:Middle Aged; D013806:Theophylline / Q000009:adverse effects / Q000627:therapeutic use*
chemical_list: D004338:Drug Combinations; D006919:Hydroxyzine; D013806:Theophylline; D000420:Albuterol