title: Beta 2-agonists.
mesh_terms: D000280:Administration, Inhalation; D000318:Adrenergic beta-Agonists / Q000009:adverse effects* / Q000378:metabolism; D001249:Asthma / Q000188:drug therapy*; D006801:Humans; D011943:Receptors, Adrenergic, beta / Q000378:metabolism; D013618:Tachyphylaxis / Q000502:physiology*
chemical_list: D000318:Adrenergic beta-Agonists; D011943:Receptors, Adrenergic, beta