Drug-induced sensorineural deafness caused by antithyroid drugs: a rare side effect

Acute ototoxicity is a rare but important complication of antithyroid drugs. Although previous cases have been reported in the medical literature, these cases occurred in younger patients with serological evidence of lupus-like syndrome with positive antidouble-stranded deoxyribonucleic acid and antineutrophil cytoplasmic antibodies. We describe the case of a 68-year-old Caucasian male who developed deafness and tinnitus one week after being prescribed carbimazole.