IpratropiumAtropine DerivativesAlbuterolBronchodilator AgentsFenoterolNebulizers and VaporizersCholinergic AntagonistsCromolyn SodiumAerosolsLung Diseases, ObstructiveScopolamine DerivativesAdministration, InhalationOzone DepletionForced Expiratory VolumeBromidesDrug IncompatibilityAsthmaPeak Expiratory Flow RatePharmaceutic AidsAirway ResistanceDouble-Blind MethodBronchitisChlorofluorocarbonsRespiratory Function TestsClemastineVital CapacityBronchoconstrictionBenzalkonium CompoundsDrug StorageAsthma, Exercise-InducedMuscarinic AntagonistsTerbutalineMetered Dose InhalersPulmonary Disease, Chronic ObstructiveRespiratory TherapyDrug PackagingClinical Trials as TopicCross-Over StudiesDrug CombinationsSpirometryCyanogen BromideDrug Therapy, CombinationAdrenergic beta-AgonistsEthanolaminesGlycopyrrolateBenzaldehydesDosage FormsLungAirway ObstructionMetaproterenolBronchiDrug Administration ScheduleDose-Response Relationship, DrugDyspnea