Targeted topical steroid administration avoids the significant systemic side effects of oral steroids and may offer more effective dosing than simple transtympanic injection of medicine. Although these findings are preliminary, it is possible that after further study, targeted drug delivery may be a useful technique to consider in patients with severe to profound hearing loss that have failed all other management options.

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Three weeks after exposure, permanent threshold shifts for the experimental groups were significantly reduced to approximately = 10-30 dB less than that for the control group (p < 0.01). Less hair cell loss was also observed in the ALCAR and NAC groups than in the control group.

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