Gabapentin is not a well-established cause of hearing loss. It is not listed as a hearing-related side effect on the FDA-approved label for Neurontin, and large clinical trials have not identified hearing impairment, deafness, or tinnitus as adverse reactions. However, there is at least one documented case in the medical literature where gabapentin toxicity led to reversible hearing loss, and the circumstances of that case offer useful details if this side effect concerns you.
What the FDA Label Does and Doesn’t Say
The prescribing information for Neurontin (the brand name for gabapentin) does not list hearing loss, tinnitus, or deafness anywhere in its adverse reaction tables. These tables draw from pooled, placebo-controlled trials involving hundreds of patients treated for nerve pain and epilepsy. The most common side effects in those trials were dizziness (reported by up to 28% of patients), drowsiness (up to 21%), and fatigue. The postmarketing section, which captures rare side effects reported after a drug reaches the broader population, also contains no mention of hearing problems.
This doesn’t mean it’s impossible. Postmarketing reports are voluntary, so uncommon reactions can go underreported. But it does mean hearing loss has not appeared frequently enough or convincingly enough for the FDA to flag it.
The One Documented Case
A case report published in Clinical Therapeutics described a patient with acute kidney failure who developed hearing loss, involuntary muscle jerking, and confusion while taking gabapentin at a standard dose of 300 mg three times daily. On admission, the patient’s blood level of gabapentin was 17.6 micrograms per milliliter, a concentration consistent with toxicity. Previous reports have noted that symptoms tend to appear when blood levels approach or exceed 15 micrograms per milliliter.
The critical detail: the patient’s kidneys had stopped filtering the drug properly. Gabapentin is almost entirely eliminated by the kidneys, so when kidney function drops, the drug accumulates in the bloodstream even at normal doses. This patient was taking a dose well within the typical range of 900 to 3,600 mg per day, yet the kidney failure pushed drug levels into a toxic range.
Why Kidney Function Matters
Gabapentin is unusual among medications because it is not broken down by the liver. Instead, it passes through the kidneys essentially unchanged. If your kidneys are working normally, the drug clears your system in a predictable way. If kidney function is impaired, even mildly, gabapentin can build up to levels the body isn’t designed to handle.
This is why gabapentin prescribing guidelines call for lower doses in people with reduced kidney function. The hearing loss case described above occurred in someone whose kidneys had acutely failed, creating a situation where a normal prescription dose became a toxic one. For people with healthy kidneys taking gabapentin as prescribed, this particular pathway to hearing loss is extremely unlikely.
Is the Hearing Loss Reversible?
In the reported case, yes. The patient’s hearing loss, confusion, and muscle jerking all improved after a single session of hemodialysis, which rapidly cleared gabapentin from the bloodstream. By the time of discharge four days later, all symptoms had fully resolved. The gabapentin blood level dropped from 17.6 micrograms per milliliter to undetectable.
This pattern, where symptoms appear with high drug levels and resolve once those levels drop, strongly suggests the hearing loss was a direct effect of gabapentin toxicity rather than permanent damage to the ear or auditory nerve. The authors of the case report concluded the symptoms were “probably due to gabapentin toxicity” based on this rapid recovery.
How Gabapentin Affects Nerve Signaling
Gabapentin works by binding to a specific part of calcium channels on nerve cells, which reduces the release of excitatory chemical signals. This is what makes it useful for nerve pain and seizures: it dials down overactive nerve firing. In the brain, gabapentin also enhances inhibitory signaling, essentially making it harder for neurons to fire when they shouldn’t.
At toxic concentrations, this dampening effect could plausibly interfere with the auditory processing pathways in the brain. Hearing depends on precise electrical signaling from the inner ear through the auditory nerve to the brain’s processing centers, and a drug that broadly suppresses nerve activity at high levels could disrupt that chain. This would explain why the hearing loss in the documented case was central (related to brain processing) rather than structural damage to the ear itself, and why it reversed once the drug was cleared.
What This Means Practically
If you’re taking gabapentin at a prescribed dose and your kidney function is normal, hearing loss from this medication is not a well-supported concern. It does not appear in clinical trial data, and the single documented case involved a very specific situation: kidney failure causing drug accumulation to toxic levels.
If you have kidney disease or reduced kidney function and are taking gabapentin, the risk profile shifts. Your prescriber should already be adjusting your dose based on kidney function, but symptoms like new hearing changes, confusion, unusual drowsiness, or involuntary muscle movements could signal that drug levels are climbing too high. These symptoms appeared together in the documented case, so hearing loss in isolation would be less typical of gabapentin toxicity specifically.
If you’ve noticed hearing changes while taking gabapentin and your kidney function is normal, other causes are statistically far more likely. Age-related hearing loss, noise exposure, earwax buildup, and other medications (particularly certain antibiotics, loop diuretics, and chemotherapy drugs) are all more common culprits. That said, any new hearing loss is worth getting evaluated regardless of what medications you’re taking.