GlycopyrrolateIndansQuinolonesAdrenergic beta-2 Receptor AgonistsBronchodilator AgentsScopolamine DerivativesMuscarinic AntagonistsAtropa belladonnaPulmonary Disease, Chronic ObstructiveAdministration, InhalationAlbuterolForced Expiratory VolumeHealthy VolunteersParasympatholyticsCharcoalDrug Administration ScheduleAdrenergic beta-2 Receptor AntagonistsEthanolaminesLungTreatment OutcomeExercise ToleranceBronchoconstrictionSeverity of Illness IndexRecovery of FunctionTime FactorsDyspneaInspiratory CapacityDouble-Blind MethodDrug SubstitutionPlacebosDrug Dosage CalculationsCross-Over StudiesAdrenergic beta-AgonistsTachyphylaxisDose-Response Relationship, DrugDelayed-Action PreparationsNebulizers and VaporizersRandomized Controlled Trials as TopicReceptors, Adrenergic, beta-2Respiratory Function TestsDrug CombinationsBudesonideControlled Clinical Trials as TopicAndrostadienesSpirometryArea Under CurveVital Capacity