AlbuterolBronchodilator AgentsNebulizers and VaporizersAdministration, InhalationIpratropiumAdrenergic beta-2 Receptor AgonistsInhalation SpacersMetered Dose InhalersRacepinephrineAdrenergic beta-AgonistsBronchial SpasmOzone DepletionAsthmaChlorofluorocarbonsDouble-Blind MethodAerosol PropellantsBronchoconstrictionAerosolsRespiratory Therapy Department, HospitalTreatment OutcomeDrug Administration ScheduleForced Expiratory VolumeAnti-Asthmatic AgentsEquipment DesignBronchiolitisDrug IncompatibilityForced Expiratory Flow RatesBeclomethasoneReceptors, Adrenergic, beta-2Time FactorsRadiation DosageLethal Dose 50MasksStereoisomerismModels, AnatomicAdministration, OralDrug CombinationsAirway ResistancePulmonary Disease, Chronic ObstructiveBronchial Provocation TestsRespiratory TherapyDrug Therapy, CombinationEquipment SafetyMyasthenic Syndromes, CongenitalRadiometryRespiratory Function TestsManikinsBudesonidePropanolaminesGlucocorticoidsDose-Response Relationship, RadiationPeak Expiratory Flow RateLungIntubation, IntratrachealHydrocarbons, FluorinatedDose FractionationPlacebosAndrostadienesAdrenal Cortex HormonesRadiotherapy DosageInjections, IntravenousMissouriRespiration, ArtificialDisease Models, AnimalArea Under CurveBronchiDrug Delivery SystemsRespiratory SoundsAnesthesia, InhalationTracheaSpirometryPlethysmographyRespiratory MechanicsModels, BiologicalHalf-LifeVital CapacityRadiotherapy Planning, Computer-AssistedInfusions, IntravenousPyrrolidinonesMice, Inbred BALB CRats, Sprague-DawleySeverity of Illness IndexReceptors, Adrenergic, betaEstrenesAntineoplastic AgentsBronchial HyperreactivityAcute DiseasePediatricsCells, CulturedDrug InteractionsIsomerism