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Acetyl-L-Carnitine (ALCAR) has been investigated for tinnitus due to its antioxidant, mitochondrial-protective, and neuroprotective properties. A combination study with alpha-lipoic acid and B vitamins demonstrated effective reduction of tinnitus discomfort. A published case study demonstrated audiological and neuroimaging changes following 30 days of ALCAR at 500 mg twice daily.

Alpha-Lipoic Acid (ALA) is a potent antioxidant that has been studied for tinnitus in combination with acetyl-L-carnitine and B vitamins. An Italian multicenter clinical survey found that this combination significantly reduced tinnitus discomfort, and ALA is proposed to protect cochlear hair cells from oxidative stress.

Ginkgo biloba, particularly the standardized extract EGb 761, is the most extensively studied botanical for tinnitus. A 2011 systematic review found evidence of efficacy for EGb 761 from three RCTs in patients with primary tinnitus. However, a 2022 Cochrane review concluded that current evidence does not demonstrate benefit over placebo, and major guidelines (AAO-HNS, European Multidisciplinary) now recommend against its use. The mixed evidence base is partly attributed to differences in preparation quality.

A small double-blind, placebo-controlled trial tested ipriflavone in patients with tinnitus due to otosclerosis, administered pre- and post-stapedectomy over six months. Tinnitus was arrested in four of nine ipriflavone-treated patients preoperatively versus one of seven on placebo. Postoperatively, all ipriflavone-treated patients but only 50% of placebo patients experienced tinnitus relief. Evidence is preliminary due to small sample size.

Serum magnesium levels are measurably lower in people with tinnitus than in the general population. Magnesium protects cochlear hair cells from noise-induced damage by blocking calcium influx and reducing oxidative stress. A Phase 2 clinical trial found that magnesium supplementation reduced tinnitus-related handicap as measured by the THI, and preliminary studies show benefit on tinnitus perception.

Melatonin at 3 mg nightly has been evaluated in multiple clinical trials for tinnitus. A 2024 meta-analysis of six prospective studies (n=176) found a statistically significant weighted mean reduction in Tinnitus Handicap Inventory (THI) scores. Benefits are most evident in patients with severe or bilateral tinnitus and in those with sleep disturbance related to tinnitus.

N-Acetyl Cysteine (NAC) is a precursor to glutathione and a direct antioxidant that has been studied for the prevention of noise-induced hearing loss, a major cause of tinnitus. Multiple RCTs and a systematic review support its ability to reduce oxidative cochlear damage from acoustic overexposure, thereby potentially preventing tinnitus onset.

Pycnogenol (pine bark extract) is listed among studied uses for tinnitus (ringing in the ears) by RxList and NIH LiverTox. Pycnogenol improves cochlear microcirculation via endothelial NO stimulation, which is mechanistically relevant to tinnitus associated with vascular/circulatory dysfunction.

A clinical study showed that improvement of cochlear microcirculation with Pycnogenol terminated tinnitus and Ménière's disease in 87% of patients vs. 35% in controls. The mechanism involves improved microvascular blood flow to the inner ear. Evidence is pilot-level with a strong effect size.

Vinpocetine, a semi-synthetic derivative of vincamine from the periwinkle plant, has been used traditionally in Europe (particularly Germany) to treat tinnitus associated with poor cochlear blood flow. It acts as a sodium channel blocker and cerebrovascular vasodilator. Preliminary clinical data indicate benefit for tinnitus with a vascular or ischemic origin, and a Phase 2 open-label study showed hearing improvement.

Vitamin B12 deficiency has been linked to tinnitus and noise-induced hearing loss in multiple observational studies. A randomized double-blind pilot RCT found that B12-deficient tinnitus patients receiving intramuscular B12 (2500 mcg weekly for 6 weeks) showed significant improvement in tinnitus severity index scores and visual analog scale ratings.

Zinc has a documented role in cochlear physiology and synaptic transmission in the auditory system. Zinc deficiency has been reported in 2–69% of tinnitus patients across studies. A 2016 Cochrane systematic review of three RCTs (n=209) found no statistically significant evidence that oral zinc supplementation improves tinnitus symptoms, though a mechanistic rationale exists.

Tinnitus is listed in the MHRA UK Public Assessment Report as a traditional use of black cohosh, and the NIH ODS notes it as a menopausal symptom for which black cohosh is promoted. No dedicated clinical trials exist for black cohosh as a tinnitus treatment.

Tinnitus is listed among feverfew's traditional indications in both the NCCIH and the PMC systematic review. Traditional European herbalism applied feverfew to tinnitus, often alongside dizziness and vertigo. No clinical trials address this use.

Tinnitus is listed as a traditional indication for GE in the Pharmacopoeia of the People's Republic of China and related preparations such as Tianma Gouteng Granules. The mechanism proposed in TCM is 'calming liver yang' and improving cerebrovascular circulation, but dedicated clinical trials for tinnitus are lacking.

Tinnitus is one of the classical TCM indications for Shi Jue Ming, listed in monographs as a symptom of Liver Yang rising or Liver Fire for which abalone shell is prescribed. No human clinical studies have specifically tested it for tinnitus.

Tinnitus is a documented traditional indication for kudzu in TCM, listed in classical herbal references. Puerarin has been used clinically in China via injection for sudden deafness and related auditory conditions, providing indirect mechanistic support through its effects on microcirculation and cerebrovascular blood flow. No controlled human trials specifically for tinnitus have been published.

Tinnitus is listed as a documented traditional use of feverfew in the PMC systematic review, the NCCIH, and multiple herbal pharmacopoeias. No clinical trials have examined feverfew for tinnitus. The traditional use is consistently recorded but entirely unsupported by controlled clinical evidence.

Tinnitus is a documented traditional TCM indication for Ligustrum lucidum, attributed to liver-kidney yin deficiency. It appears in the Chinese Pharmacopoeia, Wikipedia's TCM sources, and multiple ethnobotanical references. No human clinical trial data exist specifically for tinnitus.

Steamed Rehmannia has been used in traditional Oriental medicine specifically for tinnitus and inner ear diseases. The Restorative Medicine monograph lists tinnitus and hearing damage among its documented indications. TCM assigns tinnitus to kidney yin deficiency, the core indication for Rehmannia, and classical formulas like Liuwei Dihuang Wan are prescribed specifically for deficiency-pattern tinnitus.

Tinnitus associated with Kidney Yin deficiency is a classical TCM indication for rehmannia. Liu Wei Di Huang Wan is a primary formula for this presentation. Herbal Reality and practitioner references note support for rehmannia use in inner ear diseases including tinnitus.