GranisetronAntiemeticsVomitingNauseaSerotonin AntagonistsOndansetronSolutionsReceptors, Serotonin, 5-HT3Serotonin 5-HT3 Receptor AntagonistsProchlorperazineVomiting, AnticipatoryMetoclopramideReceptors, SerotoninQuipazineDouble-Blind MethodDexamethasoneGaggingIsonipecotic AcidsIndazolesDroperidolSerotonin 5-HT3 Receptor AgonistsSerotoninTympanoplasty5-MethoxytryptaminePostoperative Nausea and VomitingPreanesthetic MedicationPrimary Prevention