IpratropiumAtropine DerivativesAtropineHypersensitivity, DelayedAlbuterolBronchodilator AgentsScopolamine DerivativesDrug HypersensitivityCholinergic AntagonistsFenoterolNebulizers and VaporizersMuscarinic AntagonistsAerosolsLung Diseases, ObstructiveCromolyn SodiumAdministration, InhalationGlycopyrrolateForced Expiratory VolumeHypersensitivityDrug IncompatibilityPeak Expiratory Flow RateAsthmaOzone DepletionMetaproterenolAirway ResistanceDouble-Blind MethodAlveolitis, Extrinsic AllergicDermatitis, ContactTerbutalinePulmonary Disease, Chronic ObstructiveBronchoconstrictionDentin SensitivitySkin TestsPharmaceutic AidsBronchitisRespiratory Function TestsClemastineParasympatholyticsHypersensitivity, ImmediateVital CapacityChlorofluorocarbonsReceptors, MuscarinicAdrenergic beta-AgonistsDinitrofluorobenzeneRespiratory TherapyDrug StorageDose-Response Relationship, DrugDrug Therapy, Combination