IpratropiumAtropine DerivativesPharmaceutic AidsAlbuterolBronchodilator AgentsFenoterolNebulizers and VaporizersCholinergic AntagonistsCromolyn SodiumAerosolsLung Diseases, ObstructiveScopolamine DerivativesOzone DepletionAdministration, InhalationForced Expiratory VolumeBromidesDrug IncompatibilityAsthmaPeak Expiratory Flow RateAirway ResistanceDouble-Blind MethodBronchitisChlorofluorocarbonsRespiratory Function TestsClemastineVital CapacityBronchoconstrictionBenzalkonium CompoundsAsthma, Exercise-InducedDrug StorageMuscarinic AntagonistsTerbutalinePulmonary Disease, Chronic ObstructiveMetered Dose InhalersRespiratory TherapyDrug PackagingClinical Trials as TopicCross-Over StudiesDrug CombinationsCyanogen BromideSpirometryDrug Therapy, CombinationAdrenergic beta-AgonistsGlycopyrrolateEthanolaminesBenzaldehydesDosage FormsLungAirway ObstructionMetaproterenolBronchi