Back in 2005 I went to bed with fine hearing and woke up the next morning with NO hearing in the right ear and tinnitus. I had not been sick nor been aware of any infection. I got a same-day appointment with my primary physician who put me on prednisone and an antiviral and sent me to an ENT who saw me the next day. Over the next few days my hearing started returning.
On my own I went to consult a Boston doctor who specialized in sudden sensorineural hearing loss. He tested me, approved of the treatment and said that I “took the prize” for how promptly I got treatment. He said he saw many patients whose doctor sent them home with a decongestant, only to find out a month later that their hearing loss was permanent.
Over the next month or so my hearing gradually returned, but not completely. I have a significant loss in the lower frequencies in the right ear, and the tinnitus never went away. I had been playing trombone in a town band, but had to give it up because the practices were painful.
Recently it got so that I was having so much trouble understanding people in noisy situations, or even my own wife, that I visited an audiologist again (had done so a couple years back) and got fitted for hearing aids, my first. I should have them (Oticon OPN MiniRITE BTE) in a couple of weeks.
The advice I would give you is what the doctors told me - always treat sudden hearing loss as a medical emergency and don’t take no for an answer. Tapered prednisone does help, but it is not a cure-all. Pretty much everything else I have seen suggested for this condition is worthless. And don’t talk to me about the quack tinnitus “cures”.