More on combined beta-agonists and methylxanthines in asthma.
D000318:Adrenergic beta-Agonists / Q000008:administration & dosage / Q000009:adverse effects*; D001249:Asthma / Q000188:drug therapy*; D004359:Drug Therapy, Combination; D006801:Humans; D014970:Xanthines / Q000008:administration & dosage / Q000009:adverse effects*
D000318:Adrenergic beta-Agonists; D014970:Xanthines; C008514:methylxanthine