The Efficacy of Incobotulinum Toxin A Injections for Treatment of Tinnitus: a Randomized Controlled Trial

The study intervention is a syringe of 50 units of incobotulinum toxin A total, with 25 units per side, a total of 6 injection sites incobotulinum toxin A diluted into 1 ml of normal saline, injected in equal amounts into the anterior, superior, and posterior auricular muscles using anatomical landmarks. This will be approximately 0.16 mL (8-9 units) of the combined solution per injection site.

Placebo injections will be preservative free normal saline. Injections will be administered similar to the drug injections.