This study will enroll two cohorts. Cohort 1 (n=9) will be enrolled first to rapidly assess safety and drug exposure. After the sponsor completes an unblinded safety review, Cohort 2 (n=27) will be enrolled to continue safety evaluation of FX-345.
This single-blind, placebo-controlled trial will be conducted to evaluate the safety of FX-345 administered as a single intratympanic injection in adults with acquired sensorineural hearing loss. The primary objectives are to assess the local safety, systemic safety, and pharmacokinetic (PK) profile to determine systemic exposure.