TerbutalineAlbuterolBronchodilator AgentsNebulizers and VaporizersAdrenergic beta-AgonistsAdministration, InhalationAdrenergic beta-2 Receptor AgonistsIpratropiumTocolytic AgentsAsthmaMetered Dose InhalersAerosolsInhalation SpacersChlorofluorocarbonsBudesonideRacepinephrineForced Expiratory VolumeReceptors, Adrenergic, beta-2BronchoconstrictionPeak Expiratory Flow RateBronchial SpasmOzone DepletionDouble-Blind MethodButoxamineEthanolaminesRespiratory TherapyPregnenedionesAerosol PropellantsBronchial Provocation TestsMetaproterenolReceptors, Adrenergic, betaAnti-Asthmatic AgentsPropanolaminesFenoterolRespiratory Therapy Department, HospitalBronchiButylaminesPrenalterolMaximal Expiratory Flow RateCapillary Leak SyndromeBronchiolitisMagnetocardiographyCross-Over StudiesRespiratory Function TestsDrug IncompatibilityForced Expiratory Flow RatesPowdersAirway ResistanceLungVital CapacityEquipment DesignAdrenergic beta-AntagonistsBeclomethasone