TerbutalineAdrenergic beta-AgonistsTocolytic AgentsNebulizers and VaporizersBronchodilator AgentsAdministration, InhalationBudesonideAdrenergic beta-2 Receptor AgonistsAerosolsButoxamineEthanolaminesPeak Expiratory Flow RatePregnenedionesAsthmaAlbuterolMetaproterenolFenoterolDouble-Blind MethodForced Expiratory VolumeReceptors, Adrenergic, beta-2ButylaminesPrenalterolMaximal Expiratory Flow RateCapillary Leak SyndromeChlorofluorocarbonsMagnetocardiographyPowdersReceptors, Adrenergic, betaPropranolol