Could nicotine gum silence the ringing in your ears?

This trial asks whether a single piece of nicotine gum can reduce the loudness of tinnitus—the phantom ringing or buzzing in the ears—in non-smoking adults who have had chronic tinnitus for at least six months. Participants will chew either a 4 mg nicotine gum or a flavor-matched placebo gum in two separate sessions, without knowing which is which. The study measures changes in tinnitus loudness and the ability to focus on relevant sounds, comparing the nicotine session to the placebo session.