Metered Dose InhalersDry Powder InhalersNebulizers and VaporizersAerosol PropellantsChlorofluorocarbonsAdministration, InhalationPowdersBronchodilator AgentsHydrocarbons, FluorinatedAlbuterolBeclomethasoneAnti-Asthmatic AgentsAerosolsAsthmaInhalation SpacersBudesonideIpratropiumEthanolaminesEquipment DesignPregnadienediolsFenoterolTerbutalineRespiratory System AgentsForced Expiratory VolumeAsperger SyndromeCross-Over StudiesRespiratory TherapyPulmonary Disease, Chronic ObstructiveHydrofluoric AcidParticle SizeDouble-Blind MethodPeak Expiratory Flow RateChlorofluorocarbons, MethanePregnenedionesAdrenergic beta-AgonistsScopolamine DerivativesAutistic DisorderAndrostadienesAdrenal Cortex HormonesGram-Negative Facultatively Anaerobic RodsPatient Education as TopicDrug CombinationsDrug Delivery SystemsChemistry, PharmaceuticalTherapeutic EquivalencyCromolyn SodiumAdrenergic beta-2 Receptor AgonistsLung Diseases, ObstructiveCholinergic AntagonistsScotomaTreatment OutcomeHoarsenessPatient ComplianceTechnology, PharmaceuticalGlucocorticoidsInspiratory CapacityMaximal Expiratory Flow RateAnti-Inflammatory AgentsVisual FieldsOzone DepletionAtropine DerivativesRespiratory Function TestsSelf AdministrationPatient PreferenceBronchial SpasmFactor XIILungMedication AdherenceTechnetiumVital CapacityMentally Disabled PersonsDrug Therapy, CombinationInhalationEquipment FailureDrug Administration ScheduleBiological AvailabilityCharcoalSpirometryWechsler ScalesMetaproterenolBronchoconstrictor AgentsBronchoconstrictionGram-Negative Anaerobic BacteriaOropharynxCommunity Pharmacy ServicesApraxia, IdeomotorChlorobenzenesMucociliary ClearanceAsthma, Exercise-InducedDose-Response Relationship, DrugPatient SatisfactionHydrocortisoneSelf CareNedocromilTechnology Assessment, BiomedicalAir FiltersVision DisordersProcaterolChewing GumPhysicochemical Phenomena