Just sharing an article in case it is relevant for someone here. Apparently the makers of Tepezza found that 10% of patients taking their drug reported hearing loss or tinnitus while on the drug. Seems like a pretty large percentage having such a dramatic side effect.
I did have Tepezza infusions for Thyroid Eye Disease treatment. No hearing effects were noted. Same audiogram before and after. Possible hearing side effects were made clear before starting the drug. Permanent effects were not known at that time.