Intratympanic Administration of OTO-313 Reduces Tinnitus in Patients with Moderate to Severe, Persistent Tinnitus: A Phase 1/2 Study
2021
Objective To evaluate the safety and exploratory efficacy of intratympanic administration of OTO-313 in patients with tinnitus. Study design Single intratympanic injection of OTO-313 evaluated in a randomized, double-blind, placebo-controlled Phase 1/2 clinical study. Setting Tertiary referral centers. Patients Patients with unilateral tinnitus (moderate-severe) with tinnitus duration 1 to 6 months. Interventions Intratympanic OTO-313. Main outcome measures Safety and change from baseline in tinnitus functional index (TFI), daily ratings of tinnitus loudness and annoyance, and patient global impression of change (PGIC). Results OTO-313 was well-tolerated with lower incidence of adverse events than placebo. Mean TFI reduction from baseline favored OTO-313 at Week 2, 4, and 8. A clinically meaningful, 13-point improvement on the TFI was observed in 43% (6/14) of OTO-313 patients at both Weeks 4 and 8 versus 13% (2/16) of placebo patients (ad hoc responder analysis, p-value Conclusions OTO-313 was well-tolerated and demonstrated a higher proportion of responders than placebo across consecutive visits (Weeks 4 and 8) supporting further clinical development of OTO-313 for the treatment of tinnitus.
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