Instability Due to Drug-Induced Vestibulotoxicity.

OBJECTIVE The therapeutic use of ototoxic drugs is relatively common, particularly in patients with severe diseases. It is likely that disturbances of balance in these patients are underestimated by clinicians. MATERIALS AND METHODS The purpose of this study was to identify drugs involved in the vestibulotoxic origin of instability in a group of 18 patients. RESULTS Six patients showed both cochlear and vestibular damage, while 12 were affected only by posterior labyrinthine damage. Four groups of drugs were identified: antibiotics (nine patients), cytostatics (four), anti-tuberculosis medicinal products (three), and other drugs (two). Cytostatics were involved in many cases studied, a fact scarcely reported before. CONCLUSION It is important to ensure an early diagnosis to prevent ototoxic effects induced by drugs. We propose that patients receiving potential ototoxic drugs undergo cochlear and vestibular assessments. Further, we recommend that patients with instability undergo vestibular rehabilitation.