OBJECTIVE: To tell a case of tinnitus unchained for use of verbal ciprofloxacin. STORY: O.L.V., masculine, 62 years, previously healthy, without systemic disease, nor otologic, comes to the consultation in the clinic of tinnitus (SUS) with complaint of bilateral tinnitus, sudden beginning, of constant, not pulsatile perception, type whistle, unchained after use of 75 days of 1 gr/day of verbal ciprofloxacin for treatment of chronic prostatitis, where it was prescribed, for the urologist, per 90 days. In 75th day, the patient alleged to have the first sensation of tinnitus. Worried, he consulted to the papal brief and discovered a possible relation of the tinnitus with the use of the medicine. In 80th day, the patient suspended proper and looked on specialized account attendance. At this moment, it related 10/10 in the scale of bother degree, with intense anxiety. It was guided to keep suspended the use of the ciprofloxacin, being been prescribed 24 mg of betahistine dihydrocloride of 12/12 hours; 01 capsule of polyvitamin Active Supradyn in the lunch; orientation for increase of water ingestion, to reduce the ingestion of coffee, chocolate, caffeine. With 30 days, in new consultation, he alleged partial improvement alleging degree of bother of 8/10, with important anxiety. Consultation brought requested examinations in 1th: the audiometry disclosed, only, a sensorineural hearing loss, from 3KHz, bilaterally; doppler of carotid and the laboratorial of the protocol of tinnitus without alterations. Behavior: kept. With 60 days, he alleged important improvement of the tinnitus complaint, with degree of 1/10 bother, great control of the anxiety picture. CONCLUSION: 1) The tinnitus generally is not recognized as an adverse event in the treatment with verbal ciprofloxacin. Particularly, in aged patients, this complaint can be ignored or be confused with some possible preexisting condition. 2) To cease the use the verbal ciprofloxacin to the first signals of tinnitus and to institute the IMMEDIATE medicamentous therapy, can be relatively efficient a therapeutical measure to get relief of the perception of the tinnitus.