Castillo, J G Effect of ketotifen on phosphodiesterase activity from asthmatic individuals. [electronic resource] - Allergologia et immunopathologia - 197-201 p. digital Publication Type: Journal Article ISSN: 0301-0546 Subjects--Topical Terms: 3',5'-Cyclic-AMP Phosphodiesterases--antagonists & inhibitorsAsthma--enzymologyEnzyme ActivationHistamine Release--drug effectsHumansKetotifen--pharmacologySecond Messenger Systems--drug effects