Spelling it out:
It’s a known fact that many people (not all!) with schizophrenia experience auditory hallucinations. Conversely, individuals on these prescribed medications in treating schizophrenia can suffer from a decline in cognition (i.e., slurred speech, reduction in thought processing, slowed gait).
It has to be emphasized these particular above-mentioned cognitive processes were healthy before medications were administered.
Thus, there is a potential argument which can suggest that a patient using medicine to treat schizophrenia may experience a side effect involving their hearing.
Research is necessary to ascertain just how devastating this health issue can become for current patients, new patients, and patients in the future, all diagnosed with schizophrenia.