BasophilsHistamine ReleaseImmunoglobulin EHistamineDesensitization, ImmunologicAllergensReceptors, Histamine H1Receptors, Histamine H2Receptors, HistamineHistamine AntagonistsHistamine AgonistsHistamine H1 AntagonistsReceptors, Histamine H3Basophil Degranulation TestHistamine H2 AntagonistsHistamine N-MethyltransferasePyrilamineMast CellsHistidine DecarboxylaseMethylhistaminesDimapritHistamine H3 AntagonistsHistamine AgentsReceptors, IgECimetidineAnaphylaxisChlorpheniramineAntigens, CD63Hypersensitivity