AlbuterolBronchodilator AgentsNebulizers and VaporizersAdministration, InhalationIpratropiumAdrenergic beta-2 Receptor AgonistsInhalation SpacersMetered Dose InhalersRacepinephrineAdrenergic beta-AgonistsBronchial SpasmOzone DepletionAsthmaChlorofluorocarbonsAerosol PropellantsBronchoconstrictionDouble-Blind MethodAerosolsRespiratory Therapy Department, HospitalDrug Administration ScheduleForced Expiratory VolumeTreatment OutcomeAnti-Asthmatic AgentsBronchiolitisEquipment DesignDrug IncompatibilityForced Expiratory Flow RatesBeclomethasoneReceptors, Adrenergic, beta-2Radiation DosageLethal Dose 50Time FactorsMasksModels, AnatomicDrug CombinationsAdministration, OralStereoisomerismBronchial Provocation TestsPulmonary Disease, Chronic ObstructiveAirway ResistanceRespiratory TherapyEquipment SafetyMyasthenic Syndromes, CongenitalRadiometryDrug Therapy, CombinationRespiratory Function TestsManikinsPropanolaminesBudesonideGlucocorticoidsIntubation, IntratrachealDose-Response Relationship, RadiationPeak Expiratory Flow RateLungHydrocarbons, FluorinatedDose FractionationRadiotherapy DosageAndrostadienesAdrenal Cortex HormonesPlacebosMissouriInjections, IntravenousRespiration, ArtificialArea Under CurveRespiratory SoundsBronchiDrug Delivery SystemsAnesthesia, InhalationSpirometryTracheaPlethysmographyDisease Models, AnimalRespiratory MechanicsRadiotherapy Planning, Computer-AssistedHalf-LifeVital CapacityInfusions, IntravenousPyrrolidinonesEstrenesReceptors, Adrenergic, betaPediatricsBronchial HyperreactivityMice, Inbred BALB CModels, BiologicalSeverity of Illness IndexRats, Sprague-DawleyAntineoplastic Agents