They belong to the group of hormonal drugs and body produces them itsel in small amounts.
These drugs with numerous side effects can be effective when administered shortly after acoustic trauma. They can help even in a damaged cochlea by ototoxic medications, but in that case damage occurs more or less gradually, hence it is possible that their efficacy is not so great. But in principle, acoustic trauma and ototoxic drugs cause the same kind of damage.
Corticosteroids (eg., Prednisone, methylprednisolone, prednisolone) taken timely significantly reduce inflammation and can save auditory cells that would otherwise be destroyed by it. We can say that this is a first-aid, very effective in early (within 48 hours after AT) stage, but virtually ineffective when used too late (for example, after a week of AT). In any case, there is no need to throw in the towel and possibly corticosteroids try even if you came late to the doctor.
