brivaracetam vs tiagabine
PlainMeds reviewed this comparison against our methodology in August 2026. It places FDA and CMS record fields side by side, without recommending either medication.
Side-by-side comparison of brivaracetam and tiagabine. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Briviact
Gabitril
Brivaracetam is a medicine used to treat partial-onset seizures. It helps to reduce the number of seizures you have.
Tiagabine is a medicine used with other medicines to treat partial seizures. It helps to control seizures by affecting certain chemicals in the brain.
Brivaracetam is used to treat partial-onset seizures. These seizures start in one part of the brain. It can be used alone or with other seizure medicines for people 1 month and older.
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.
Brivaracetam binds to a protein in the brain called SV2A. This helps to reduce the electrical activity in the brain that causes seizures. It helps to stabilize nerve cells.
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.
- • Feeling sleepy or tired
- • Dizziness
- • Fatigue
- • Nausea or vomiting
- • Dizziness
- • Lack of energy
- • Sleepiness
- • Nausea
- • Nervousness or irritability
- Seizure 1,810
- Therapy Interrupted 280
- Overdose 233
- Fatigue 230
- Somnolence 216
- Encephalopathy 16
- Myoclonus 14
- Dizziness 6
- Feeling Abnormal 5
- Seizure 5
Brivaracetam can cause suicidal thoughts or actions. Watch for new or worsening depression, suicidal thoughts or behavior, or unusual changes in mood. Tell your doctor right away if you have any of these symptoms. Do not stop taking brivaracetam suddenly, as this may increase your risk of seizures.
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.
Tell your doctor if you are pregnant or plan to become pregnant. There is a pregnancy registry for women who take brivaracetam during pregnancy. Contact the North American Antiepileptic Drug (NAAED) Pregnancy Registry at 1-888-233-2334.
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.
How to Read This brivaracetam vs tiagabine Comparison
brivaracetam is classified in the Anticonvulsant (SV2A Ligand) 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, brivaracetam has 2,769 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. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. 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 brivaracetam or tiagabine.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.