DizzinessNauseaVertigoPostoperative Nausea and VomitingVestibular DiseasesVomitingAntiemeticsVestibular Function TestsVestibular NeuronitisMeniere DiseaseMotion SicknessHeadacheOndansetronNystagmus, PathologicWhiplash InjuriesDouble-Blind MethodPostural BalanceNystagmus, PhysiologicSensation DisordersSyncopeTreatment OutcomeLabyrinth DiseasesVomiting, AnticipatoryDiagnostic Techniques, OtologicalAcupressureMorning SicknessGranisetronDroperidolProchlorperazineDrug Administration ScheduleMetoclopramideLabyrinthine FluidsHypotension, OrthostaticPain, PostoperativeOtorhinolaryngologic DiseasesCaloric TestsSerotonin 5-HT3 Receptor AntagonistsHyperemesis GravidarumProspective StudiesAccidental FallsVestibule, Labyrinth