Bronchodilator AgentsAlbuterolIpratropiumAdministration, InhalationScopolamine DerivativesForced Expiratory VolumeAsthmaProstanoic AcidsPulmonary Disease, Chronic ObstructiveRespiratory Function TestsTerbutalineNebulizers and VaporizersSpirometryDouble-Blind MethodAdrenal Cortex HormonesMetaproterenolAirway ResistanceVital CapacityPeak Expiratory Flow RateFenoterolLung Diseases, ObstructiveAtropine DerivativesBronchoconstrictionAerosolsMetered Dose InhalersAdrenergic beta-AgonistsDrug Therapy, CombinationAirway ObstructionBronchial Provocation TestsAdrenergic beta-2 Receptor AgonistsInhalation SpacersTreatment OutcomeClemastineMethacholine ChlorideBronchiChlorofluorocarbonsRespiratory TherapyEthanolaminesInspiratory CapacityRespiratory Therapy Department, HospitalMaximal Expiratory Flow RateAntitussive AgentsCholinergic AntagonistsBronchial SpasmTheophyllineNedocromilIndansAnti-Asthmatic AgentsBronchoconstrictor AgentsCross-Over StudiesForced Expiratory Flow RatesAmino AlcoholsCoughAminophyllineFunctional Residual CapacityGlycopyrrolateLungRespiratory SoundsBeclomethasoneRespiratory Care UnitsButylaminesBudesonideParasympatholyticsTracheaNasal DecongestantsBronchitisAerosol PropellantsOscillometryPulmonary VentilationResidual VolumeDyspneaTephrosiaQuinolonesTotal Lung CapacityMuscarinic AntagonistsBronchial HyperreactivityHeliumLung CompliancePowdersDose-Response Relationship, DrugPharmaceutical SolutionsTachyphylaxisHistamineDrug LabelingCromolyn SodiumAmaranthusDrug PackagingBronchitis, ChronicProcaterolDrug ToleranceClinical Trials as TopicDrug Administration ScheduleHistamine AntagonistsAsthma, Exercise-InducedIsoproterenolGuinea PigsEphedrineRacepinephrinePlethysmography, Whole BodyAir Filters