TabletsAlbuterolAdministration, OralBronchodilator AgentsTablets, Enteric-CoatedNebulizers and VaporizersIpratropiumAdrenergic beta-2 Receptor AgonistsAdministration, InhalationInhalation SpacersRacepinephrineMetered Dose InhalersAdrenergic beta-AgonistsChemistry, PharmaceuticalExcipientsBronchial SpasmDrug CompoundingOzone DepletionAsthmaDelayed-Action PreparationsChlorofluorocarbonsAerosol PropellantsTechnology, PharmaceuticalMethylcelluloseBronchoconstrictionRespiratory Therapy Department, HospitalPowdersDrug IncompatibilityAerosolsBronchiolitisDouble-Blind MethodForced Expiratory VolumeSolubilityAnti-Asthmatic AgentsForced Expiratory Flow RatesEquipment DesignReceptors, Adrenergic, beta-2HardnessDrug CombinationsBeclomethasone