AlbuterolBronchodilator AgentsNebulizers and VaporizersIpratropiumAdrenergic beta-2 Receptor AgonistsAdministration, InhalationInhalation SpacersRacepinephrineMetered Dose InhalersAdrenergic beta-AgonistsBronchial SpasmOzone DepletionChlorofluorocarbonsAsthmaAerosol PropellantsBronchoconstrictionRespiratory Therapy Department, HospitalAerosolsBronchiolitisForced Expiratory VolumeDrug IncompatibilityForced Expiratory Flow RatesAnti-Asthmatic AgentsReceptors, Adrenergic, beta-2Equipment DesignBeclomethasone