Oregon Health & Science University Apr 20 2026 The same neurotransmitter commonly leveraged to relieve symptoms of depression and anxiety also may exacerbate a vexing condition known as tinnitus, according to new research published in the Proceedings of the National Academy of Sciences . Tinnitus is a constant sensation of ringing or buzzing in the ears, creating a continual irritation for some and severe anxiety for others. Global prevalence is estimated as high as 14%, with many severely