Comprehensive medication guide to Gabapentin including estimated pricing, availability information, side effects, and how to find it in stock at your local pharmacy.
Estimated Insurance Pricing
$0–$15 copay for generic Gabapentin on most commercial insurance and Medicare Part D plans (Tier 1–2); brand Horizant may require prior authorization and carries higher cost without the Azurity copay savings program.
Estimated Cash Pricing
$15–$90 retail for generic Gabapentin per 30-day fill; as low as $2.09 with a free GoodRx coupon or $8.98 for 90 capsules with SingleCare — among the most affordable generics available.
Medfinder Findability Score
82/100
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Gabapentin is a prescription anticonvulsant medication first approved by the FDA in 1993. It is sold under the brand names Neurontin (immediate-release), Gralise (extended-release for PHN), and Horizant (extended-release for RLS and PHN). Generic gabapentin has been available since 2004 and is manufactured by many companies.
Gabapentin is FDA-approved for three indications: partial-onset seizures (as adjunctive therapy in adults and children ages 3 and older), postherpetic neuralgia (PHN — nerve pain after shingles), and restless legs syndrome (Horizant only). It is also one of the most commonly prescribed drugs for off-label uses, including diabetic neuropathy, fibromyalgia, anxiety, hot flashes, and alcohol use disorder. In 2024, more than 73 million Gabapentin prescriptions were filled in the United States, making it one of the top 10 most prescribed drugs in the country.
Gabapentin is available in several forms: capsules (100 mg, 300 mg, 400 mg), tablets (600 mg, 800 mg), oral solution (250 mg/5 mL), and extended-release tablets (Horizant: 300 mg and 600 mg). Different formulations have different FDA approvals and are not interchangeable — always take the specific form prescribed.
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Despite its name suggesting a connection to GABA (gamma-aminobutyric acid), Gabapentin does not act on GABA receptors. Instead, it works by binding to the alpha-2-delta (α2δ) subunit of voltage-gated calcium channels on nerve cells. This is a regulatory component that controls how easily calcium enters neurons when they fire.
When Gabapentin binds to this subunit, it reduces calcium influx into overactive neurons. Less calcium means fewer neurotransmitters (like glutamate and substance P) get released — which means the abnormal firing that causes seizures and neuropathic pain is dampened. The α2δ subunit is particularly abundant in areas of the spinal cord and brain involved in pain signaling and seizure propagation, which is why Gabapentin is especially effective for these conditions.
Pregabalin (Lyrica) works through the same mechanism but has higher and more consistent bioavailability (~90% vs. ~60% for Gabapentin), which allows twice-daily instead of three-times-daily dosing. Gabapentin is renally eliminated unchanged and requires dose reduction in patients with kidney impairment.
100 mg — capsule
Typically used for titration or low-dose maintenance
300 mg — capsule
Most widely prescribed and stocked strength; standard titration starting dose
400 mg — capsule
Mid-range dose for maintenance therapy
600 mg — tablet
Common maintenance tablet dose
800 mg — tablet
Higher maintenance dose tablet
250 mg/5 mL — oral solution
Liquid form for patients unable to swallow tablets/capsules
300 mg — extended-release tablet (Horizant)
Extended-release gabapentin enacarbil prodrug; for RLS titration
600 mg — extended-release tablet (Horizant)
Standard maintenance dose for RLS and PHN (Horizant)
As of early 2026, Gabapentin tablets and capsules are generally widely available at most pharmacies. There is no active FDA-declared shortage. The drug is produced by many generic manufacturers — including Amneal, Hikma, Lupin, Aurobindo, Teva, and others — providing robust supply redundancy. The oral solution (liquid form) experienced a documented shortage from May 2023 to July 2024, which has since been resolved.
That said, with over 73 million prescriptions filled annually, local pharmacy stock gaps do occur — particularly for less common strengths (100 mg, 400 mg capsules) and in states where Gabapentin is classified as Schedule V (Kentucky, West Virginia, Tennessee, Alabama, Utah, Virginia). Independent pharmacies may run out temporarily; large chains and mail-order pharmacies are generally more reliable.
To find which pharmacies near you have your specific Gabapentin dose in stock, use Medfinder — enter your medication, strength, and zip code to see real-time availability without making phone calls.
Because Gabapentin is not a federal controlled substance, any licensed prescriber with prescribing authority can write a prescription for it in most states. In the six states where it is classified as Schedule V (KY, WV, TN, AL, UT, VA), prescribers must have DEA registration and follow state Schedule V rules — but Gabapentin remains accessible to all licensed prescribers in those states who hold DEA numbers.
Provider types who commonly prescribe Gabapentin include:
Gabapentin is widely available via telehealth in most states — because it is not federally scheduled, telehealth prescribers can issue prescriptions during standard online visits without an in-person exam requirement. In Schedule V states (KY, WV, TN, AL, UT, VA), state telehealth and controlled substance rules apply and may require an in-person evaluation for new prescriptions.
Gabapentin is not a federally scheduled controlled substance under the DEA Controlled Substances Act. Any licensed prescriber — including MDs, DOs, nurse practitioners (NPs), and physician assistants (PAs) — can prescribe it without DEA Schedule II/III/IV/V federal restrictions.
However, due to increasing reports of misuse (Gabapentin can induce euphoria at high doses and is sometimes diverted), several states have classified it as Schedule V at the state level: Kentucky, West Virginia, Tennessee, Alabama, Utah, and Virginia. In these states, prescribers must have DEA registration and pharmacies must track dispensing more carefully. Early refills may be restricted and PDMP checks may be required.
In all other states, Gabapentin can be prescribed without controlled substance requirements, refilled freely per prescriber judgment, and obtained via telehealth without an in-person visit requirement. Despite the abuse potential at high doses, Gabapentin is considered a non-scheduled drug with fewer prescribing restrictions than Schedule V federally.
The most common side effects of Gabapentin, particularly during initial titration:
Serious side effects — seek immediate care:
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Pregabalin (Lyrica)
Closest alternative; same α2δ mechanism with higher bioavailability and twice-daily dosing. FDA-approved for fibromyalgia, diabetic neuropathy, PHN, seizures, and spinal cord injury pain. Schedule V federally.
Duloxetine (Cymbalta)
SNRI approved for diabetic neuropathy, fibromyalgia, depression, and anxiety. Works via a different mechanism (serotonin/norepinephrine reuptake inhibition). Generic available.
Carbamazepine (Tegretol)
Sodium channel anticonvulsant for partial/generalized seizures and trigeminal neuralgia. More drug interactions and requires blood level monitoring. Generic available.
Topiramate (Topamax)
Anticonvulsant for seizures and migraine prevention; used off-label for neuropathic pain. May cause cognitive side effects. Generic available.
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Opioids (morphine, oxycodone, fentanyl, etc.)
majorMajor interaction — additive CNS/respiratory depression; potentially fatal. Morphine also increases Gabapentin blood levels by ~44%. Avoid unless medically necessary with close monitoring and naloxone prescription.
Benzodiazepines (alprazolam, lorazepam, diazepam, etc.)
majorMajor interaction — additive CNS depression and life-threatening respiratory depression risk. Use together only under close prescriber supervision with lowest effective doses.
Alcohol
majorMajor interaction — potentiates CNS depressant effects and increases risk of sedation and breathing problems. Also increases drug release rate from Horizant ER tablets. Avoid completely.
Aluminum/magnesium antacids (Maalox, Mylanta, Gaviscon)
moderateModerate interaction — reduces Gabapentin absorption by ~20%. Separate by at least 2 hours.
CNS depressants (sedatives, antihistamines, muscle relaxants)
moderateModerate interaction — additive sedation and CNS depression. Use with caution; monitor for excessive sedation.
Gabapentin is one of the most versatile and widely used medications in modern medicine. With FDA-approved applications for epilepsy, postherpetic neuralgia, and restless legs syndrome — and a broad range of evidence-supported off-label uses — it fills an important role in treating conditions that often prove resistant to other therapies. Its relative affordability (as low as $2 with a coupon) makes it accessible to most patients.
Key safety reminders: never stop Gabapentin abruptly, avoid combining it with opioids or alcohol without medical supervision, and ensure dose adjustment if you have kidney disease. As with any CNS-active medication, monitoring for mood changes, suicidal ideation, and respiratory symptoms is important.
If you're having trouble finding Gabapentin at your local pharmacy, Medfinder makes it easy to check real-time pharmacy inventory near you, compare prices, and find your medication without calling pharmacies one by one. Use our free pharmacy lookup tool to locate your dose and get back to focusing on your health.
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