AlbuterolMetered Dose InhalersNebulizers and VaporizersBronchodilator AgentsDry Powder InhalersAdministration, InhalationChlorofluorocarbonsIpratropiumAerosol PropellantsInhalation SpacersAdrenergic beta-AgonistsAsthmaPowdersAerosolsAdrenergic beta-2 Receptor AgonistsAnti-Asthmatic AgentsBeclomethasoneForced Expiratory VolumeBudesonideDouble-Blind MethodBronchial SpasmFenoterolEthanolaminesPeak Expiratory Flow RateRacepinephrineHydrocarbons, FluorinatedCross-Over StudiesBronchoconstrictionMagnetocardiographyAtropine DerivativesEquipment DesignTerbutalinePulmonary Disease, Chronic ObstructiveRespiratory TherapyOzone DepletionAirway ResistanceReceptors, Adrenergic, beta-2AndrostadienesDrug CombinationsMetaproterenolBronchial Provocation TestsPregnadienediolsRespiratory Function TestsParticle SizeRespiratory System AgentsCromolyn SodiumVital CapacityScopolamine DerivativesAdrenal Cortex HormonesTreatment OutcomeRespiratory Therapy Department, HospitalAminophyllineSpirometryLungForced Expiratory Flow RatesDrug Therapy, CombinationDose-Response Relationship, DrugDrug Delivery SystemsLung Diseases, ObstructiveGlucocorticoidsDrug Administration ScheduleBronchiBronchiolitisMethacholine ChloridePregnenedionesBronchoconstrictor AgentsAmino AlcoholsEstuariesPropanolaminesChlorofluorocarbons, MethaneChemistry, PharmaceuticalAirway ObstructionReceptors, Adrenergic, beta