Ciprofloxacin belongs to the Quinolone class of drugs, all of which can be quite ototoxic. Ciprofloxacin can cause severe hearing loss, loud tinnitus, ataxia, dizziness, nystagmus, vertigo and ear pain. Thus, it is a drug to be taken with caution. Since I’ve had a number of people tell me of their woes after taking Ciprofloxacin, the ototoxic side effects must be relatively common.