Researchers often tout various OTC remedies for the treatment of tinnitus, including supplementation with melatonin, zinc or ginkgo biloba, according to MedicineNet. Studies into OTC tinnitus remedies are minimal as of 2015.
One study on melatonin indicates potential use of the supplement for alleviating tinnitus symptoms, although no controlled studies verify the claim, notes MedicineNet. Research into ginkgo biloba as a remedy for tinnitus does not include controlled studies either, although proponents of its use promote it as a natural remedy. Patients with low zinc levels suffering from tinnitus potentially benefit from supplementation with zinc. Reduction of salt and caffeine intake shows promise for symptom relief.