title: Combined beta agonists and methylxanthines in asthma.
mesh_terms: D000293:Adolescent; D000318:Adrenergic beta-Agonists / Q000008:administration & dosage* / Q000009:adverse effects; D000328:Adult; D001249:Asthma / Q000188:drug therapy*; D002648:Child; D002675:Child, Preschool; D004359:Drug Therapy, Combination; D006801:Humans; D013806:Theophylline / Q000008:administration & dosage* / Q000009:adverse effects
chemical_list: D000318:Adrenergic beta-Agonists; D013806:Theophylline