Neurobion is a combination of Neurotropic vitamins B1, B6, & B12 and would be useful if you have a deficiency in these vitamins which are used in nerve cell function.
One hearing is lost for such a long period of time, it does not typically come back. It typically resumes the rate of decline of hearing with normal aging, at the lower hearing rate.
Although not much will assist any healing, you can have occupational health training in improving your functioning even with decreased hearing.
Enoch Choi, MD