TheophyllineCaffeineTheobromineAminophyllinePhosphodiesterase InhibitorsXanthinesCentral Nervous System StimulantsBronchodilator AgentsDelayed-Action PreparationsPurinergic P1 Receptor AntagonistsAdenosineCoffeeDrug InteractionsCytochrome P-450 CYP1A2Dose-Response Relationship, DrugAdministration, OralDouble-Blind MethodCyclic AMPCalciumEnoxacinBucladesineLung Diseases, ObstructiveReceptors, PurinergicAsthmaTime Factors4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinoneApneaRyanodineCross-Over StudiesAlbuterolReceptors, Purinergic P1KineticsReceptor, Adenosine A1Terahertz SpectroscopyMuscle ContractionGuinea PigsDrug Therapy, CombinationProcaineTreatment OutcomeRolipramProcaterolReceptor, Adenosine A2A1-Methyl-3-isobutylxanthineAdenosine A2 Receptor AntagonistsTabletsStimulation, ChemicalEphedrineChromatography, High Pressure LiquidMetabolic Clearance RatePapaverineReceptors, Adenosine A2