Gabapentin can help with certain types of tremors, but the evidence is mixed depending on which tremor you have. The American Academy of Neurology rates gabapentin as “probably effective” (Level B) for essential tremor, placing it a tier below the first-line options. For a less common condition called orthostatic tremor, gabapentin is considered a first-line treatment with stronger supporting evidence. It is not FDA-approved for any type of tremor, so all prescriptions for this purpose are off-label.
How It Works for Essential Tremor
Essential tremor is the most common movement disorder, causing involuntary shaking that typically affects the hands, head, or voice. The two medications with the strongest evidence behind them are propranolol (a beta-blocker) and primidone (an anti-seizure drug). Gabapentin sits in the next tier down.
A head-to-head trial comparing gabapentin to propranolol found that both medications produced significant and comparable reductions in tremor after 15 days, as measured by accelerometry (a sensor-based way of quantifying shaking). Placebo did not produce the same effect. This suggests gabapentin genuinely reduces tremor in the short term and performs similarly to propranolol when tested individually against baseline.
However, a more recent systematic review and meta-analysis pooling seven randomized controlled trials with 235 total patients told a more nuanced story. When researchers compared gabapentin directly against placebo across studies, the overall difference in clinical tremor scores was not statistically significant. Accelerometry data showed a trend favoring gabapentin, but that trend also fell short of significance. In other words, while patients on gabapentin did improve from where they started, the improvement wasn’t reliably larger than what placebo patients experienced when the data was pooled together. Within-group analysis did show a significant reduction from baseline specifically with gabapentin (but not with the related drug pregabalin), suggesting it has real physiological activity on tremor even if the pooled comparison to placebo is underwhelming.
What does this mean practically? Gabapentin helps some people with essential tremor noticeably, but the average benefit across a group of patients is modest and inconsistent. It is not the strongest option available, but it remains a reasonable choice when first-line medications don’t work well or cause intolerable side effects.
Orthostatic Tremor: Stronger Evidence
Primary orthostatic tremor is a less well-known condition that causes an unpleasant sense of unsteadiness and visible shaking in the legs when you stand still. It often improves the moment you sit down or start walking. For this specific type of tremor, gabapentin has much more convincing evidence behind it.
In a placebo-controlled crossover study of orthostatic tremor patients, gabapentin reduced tremor amplitude by about 21% and body sway by about 29% compared to placebo. All patients in the study reported symptom reduction in the range of 50% to 75% during gabapentin treatment, and all experienced worsening when the drug was washed out. Quality of life improved across the board, no adverse effects were noted, and benefits were maintained at an average follow-up of 19 months. Effective doses in that study ranged from 600 to 2,700 mg per day. Based on findings like these, gabapentin is supported as either first-line or add-on therapy for orthostatic tremor.
Parkinson’s Disease Tremor
A small double-blind, placebo-controlled crossover trial tested gabapentin in patients with Parkinson’s disease and related conditions. Tremor scores on a standardized clinical rating scale improved with gabapentin, and the study also found improvements in rigidity and slowness of movement. However, when tremor was measured using electromyography (a more objective method), the improvement was not statistically significant. This is a thin evidence base, and gabapentin is not a standard treatment for parkinsonian tremor. Dopamine-based therapies remain the cornerstone for Parkinson’s disease.
Typical Dosing and What to Expect
For essential tremor, gabapentin is usually started at 300 mg three times daily and gradually increased to a total daily dose of 1,200 to 1,800 mg. The exact dose that works varies from person to person. For orthostatic tremor, effective doses in clinical studies ranged from 600 mg to 2,700 mg per day, with each patient’s optimal dose found through a titration phase where the amount is slowly raised.
The head-to-head trial against propranolol showed measurable tremor reduction by day 15, which gives a rough sense of timing. Some people notice improvement within the first couple of weeks, but it can take longer as the dose is adjusted upward.
Side Effects
Gabapentin is generally well tolerated at the doses used for tremor. The most commonly reported side effects are drowsiness, dizziness, unsteadiness (ataxia), irritability, and weight gain. The unsteadiness is worth paying attention to, because in someone already dealing with tremor it can feel like the problem is getting worse rather than better. These effects tend to be more pronounced in older adults and are often dose-related, meaning they may improve if the dose is lowered.
Compared to first-line options, gabapentin avoids some of the specific downsides of alternatives. Propranolol can lower heart rate and blood pressure, making it a poor fit for people with asthma, certain heart conditions, or low baseline blood pressure. Primidone frequently causes significant sedation and dizziness when first started. Gabapentin’s side effect profile is different enough that it serves as a useful backup for people who can’t tolerate those medications.
Where Gabapentin Fits in Treatment
Gabapentin is not a first-choice medication for the most common type of tremor, essential tremor. Propranolol and primidone hold that position based on stronger evidence. But it sits comfortably in the second tier as a “probably effective” option, and real-world prescribing reflects this. Neurologists commonly try gabapentin when a patient hasn’t responded well to first-line drugs, when those drugs are contraindicated, or sometimes as an add-on to boost the effect of another medication.
For orthostatic tremor specifically, gabapentin is one of the best-supported treatments available and is often tried first. If you have a tremor that primarily bothers you when standing and eases when you sit or walk, this distinction matters and is worth raising with your neurologist.