RT Journal Article SR Electronic T1 Tobramycin and vestibulotoxicity: retrospective analysis of four cases JF European Journal of Hospital Pharmacy JO Eur J Hosp Pharm FD British Medical Journal Publishing Group SP ejhpharm-2020-002588 DO 10.1136/ejhpharm-2020-002588 A1 S E M Vonk A1 E J M Weersink A1 C J Majoor A1 E M Kemper A1 , YR 2021 UL http://ejhp.bmj.com/content/early/2021/03/21/ejhpharm-2020-002588.abstract AB Over a course of 7 months, four patients developed vestibulotoxicity after treatment with intravenous tobramycin. Since vestibulotoxicity is a serious adverse effect which can be irreversible, an investigation was undertaken to determine if there was a cause for the toxicity and whether the quality of care had been inadequate. In this period, 26 patients with cystic fibrosis were treated with tobramycin according to valid guidelines, of which four experienced acute dizziness which disrupted their daily activities. Two patients experienced irreversible bilateral vestibular hypofunction and two unilateral loss of the right labyrinth, with decreasing dizziness over time. No apparent cause for the vestibulotoxicity was found in these four patients and the simultaneous occurrence was not due to a lack in quality of care. Symptoms of dizziness and balance disorders should be recognised by patients and caretakers at an early stage so additional diagnostics can be done to prevent further deterioration.