AlbuterolBronchodilator AgentsNebulizers and VaporizersAdministration, InhalationIpratropiumAdrenergic beta-2 Receptor AgonistsMetered Dose InhalersInhalation SpacersRacepinephrineAdrenergic beta-AgonistsDrug Administration ScheduleDouble-Blind MethodBronchial SpasmAsthmaOzone DepletionTreatment OutcomeChlorofluorocarbonsAdministration, OralAerosol PropellantsAerosolsTime FactorsBronchoconstrictionBeclomethasoneAnti-Asthmatic AgentsForced Expiratory VolumeDose-Response Relationship, DrugRespiratory Therapy Department, HospitalDrug Therapy, CombinationDrug CombinationsEquipment DesignBronchiolitisDrug IncompatibilityForced Expiratory Flow RatesReceptors, Adrenergic, beta-2Radiation DosageLethal Dose 50Area Under CurveBudesonidePlacebosMasksGlucocorticoidsModels, AnatomicPulmonary Disease, Chronic ObstructiveBronchial Provocation TestsStereoisomerismAdrenal Cortex HormonesActivities of Daily LivingAirway ResistancePropanolaminesRespiratory TherapyHalf-LifeEquipment SafetyMyasthenic Syndromes, CongenitalPeak Expiratory Flow RateRadiometryRespiratory Function TestsDose FractionationCross-Over StudiesInjections, IntravenousAndrostadienesDose-Response Relationship, RadiationInfusions, IntravenousDrug UtilizationManikinsLungDrug EvaluationDisease Models, AnimalRadiotherapy DosageAnti-Bacterial AgentsDrug InteractionsProspective StudiesInjections, SubcutaneousNeoplasmsIntubation, IntratrachealAntineoplastic AgentsHydrocarbons, FluorinatedBody WeightDelayed-Action PreparationsRats, Sprague-DawleySeverity of Illness IndexBiological AvailabilityRandom AllocationMissouriPilot ProjectsRespiration, ArtificialFollow-Up StudiesClinical Trials as TopicMetabolic Clearance RateLiverSpirometryBronchiDrug Delivery SystemsRetrospective StudiesModels, BiologicalAnti-Inflammatory Agents, Non-SteroidalRats, WistarDietary SupplementsAnesthesia, InhalationDrug ToleranceRespiratory Sounds