I didn't know about prednisone being a treatment.Prednisone is most effective when taken 48 hours after the noise exposure.
In addition to the ER, you can get it from your family doctor, or from a walk-in clinic. You will want to take a look at the side effects. Seriously consider not taking it, as it is a serious drug...
Well, I would need a 'good' reason when I ask the medical professional - for my family doctor, saying it I wanted to try it for my tinnitus problem, he refused/declined it.