Can hearing loss caused by medication 30 years ago still be restored?
In general, individuals who have experienced drug-induced hearing loss for 30 years with severe damage to the auditory nerve are unlikely to regain hearing. Those with milder injuries or residual hearing may benefit from assistive devices. If in doubt, it is recommended to seek medical advice early. Detailed analysis is as follows:

If the auditory nerve has suffered irreversible and severe damage due to drug-induced hearing loss, and no intervention has been implemented over the course of 30 years, neural function is essentially lost. Current medical technology cannot repair the damaged nerves, making natural recovery of hearing extremely unlikely. Therefore, alternative methods are needed to assist in sound perception and improve quality of life.
If the drug-induced hearing loss is mild, with some auditory function preserved, or if the damage does not fully involve the auditory nerve, sound perception can be enhanced through devices such as cochlear implants or hearing aids, combined with auditory rehabilitation training. Although normal hearing levels cannot be restored, hearing experience can be significantly improved, reducing the impact of hearing impairment on daily life.
Upon noticing drug-induced hearing loss or any hearing abnormalities, individuals should promptly undergo a hearing evaluation at a professional institution. Even in cases of long-standing hearing loss, regular hearing check-ups are necessary. Appropriate interventions should be selected based on medical advice to prevent delays that could negatively affect quality of life.