gabapentin vs tiagabine
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Side-by-side comparison of gabapentin and tiagabine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
Carbamazepine, phenytoin, primidone, and phenobarbital are generally classified as enzyme inducers; valproate and gabapentin are not.
Neurontin, Gralise
Gabitril
Gabapentin is a medicine that can treat nerve pain and seizures. It works by calming overactive nerves in the body.
Tiagabine is a medicine used with other medicines to treat partial seizures. It helps to control seizures by affecting certain chemicals in the brain.
Gabapentin is used to manage nerve pain after shingles in adults. This is called postherpetic neuralgia. It is also used with other medicines to treat partial seizures in adults and children ages 3 and older who have epilepsy.
Tiagabine is used to treat partial seizures in adults and children 12 years and older. It is used along with other seizure medicines. Partial seizures affect only one part of the brain.
Gabapentin affects how nerves send signals to the brain. It is thought to work by decreasing the activity of overexcited nerve cells. This can reduce pain and prevent seizures.
Tiagabine works by increasing the amount of a chemical called GABA in the brain. GABA helps to calm the brain and reduce seizures. Tiagabine blocks the reuptake of GABA, which means more GABA is available in the brain.
- • Dizziness
- • Sleepiness
- • Swelling in arms and legs
- • Uncoordinated movements
- • Tiredness
- • Dizziness
- • Lack of energy
- • Sleepiness
- • Nausea
- • Nervousness or irritability
- Fatigue 24,397
- Nausea 21,946
- Pain 20,744
- Diarrhoea 17,454
- Headache 17,287
- Encephalopathy 16
- Myoclonus 14
- Dizziness 6
- Feeling Abnormal 5
- Seizure 5
This medicine can cause a severe allergic reaction with fever, rash, and organ problems. Stop taking gabapentin and get medical help right away if you have trouble breathing or swelling of your face, lips, tongue, or throat. Do not drive or operate heavy machinery until you know how gabapentin affects you. Do not stop taking gabapentin suddenly, as this may increase seizures. Gabapentin may cause suicidal thoughts or actions. Watch for changes in mood or behavior. Using gabapentin with opioid medicines can cause very slow breathing, sedation, and death. Children ages 3 to 12 may have new or worsening behavior problems.
This medicine may cause serious side effects. Tell your doctor right away if you have any changes in mood or behavior, or any suicidal thoughts.
Gabapentin may cause harm to an unborn baby based on animal studies. If you are pregnant or plan to become pregnant, talk to your doctor. Gabapentin passes into breast milk. The effects on a nursing baby are not known.
Tell your doctor if you are pregnant or plan to become pregnant. It is not known if tiagabine will harm your unborn baby. Talk to your doctor about the risks and benefits of taking tiagabine during pregnancy.
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How to Read This gabapentin vs tiagabine Comparison
gabapentin is classified in the Anticonvulsant / Nerve Pain Agent drug class, while tiagabine sits within the Anticonvulsant (GABA Reuptake Inhibitor) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, gabapentin has 101,828 submissions while tiagabine has 46. Those figures reflect cumulative reporting volume, not per-patient risk, so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to gabapentin does not speed up or slow down the liver enzymes that process tiagabine. this means it is unlikely to change how much tiagabine stays in your body.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot represent individual circumstances. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This registry does not provide medical, treatment, substitution, or medication-change directions for gabapentin or tiagabine.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.