TerbutalineAdrenergic beta-AgonistsAdministration, InhalationAlbuterolBronchodilator AgentsFenoterolAdrenergic beta-2 Receptor AgonistsNebulizers and VaporizersAsthmaPeak Expiratory Flow RateEthanolaminesEstrogen Receptor betaForced Expiratory VolumeAnti-Asthmatic AgentsTocolytic AgentsIsoproterenolDouble-Blind MethodAdrenal Cortex HormonesDose-Response Relationship, DrugReceptors, Adrenergic, betaBudesonideGlucocorticoidsReceptors, Adrenergic, beta-2Drug Therapy, CombinationButoxamineInterleukin-1betaAerosolsDopamine AgonistsPregnenedionesPulmonary Disease, Chronic ObstructiveMetaproterenolDrug Administration ScheduleAdrenergic AgonistsEstrogen Receptor alphabeta 2-MicroglobulinPrenalterolButylaminesPropanolaminesTreatment OutcomeMaximal Expiratory Flow RatePropranololAdrenergic beta-AntagonistsClenbuterolReceptors, Adrenergic, beta-3GABA AgonistsCapillary Leak SyndromeMagnetocardiographyChlorofluorocarbonsRats, Sprague-DawleyPowdersIntegrin beta3