brivaracetam vs vigabatrin
Side-by-side comparison of brivaracetam and vigabatrin Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Briviact
Sabril
Brivaracetam is a medicine used to treat partial-onset seizures. It helps to reduce the number of seizures you have.
Vigabatrin (Sabril) is a medicine used to treat certain types of seizures in adults and children. It is also used to treat infantile spasms in babies.
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.
Vigabatrin is used as an add-on treatment for complex partial seizures in adults and children 2 years and older when other treatments haven't worked well enough. It is also used alone to treat infantile spasms in babies between 1 month and 2 years old. However, it is only used if the benefits of treatment outweigh the risk of vision loss.
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.
Vigabatrin is an anticonvulsant that works by increasing the amount of a chemical called GABA in the brain. GABA helps to reduce the activity of nerve cells, which can help to control seizures. By increasing GABA levels, vigabatrin can help to reduce the frequency and severity of seizures.
- • Feeling sleepy or tired
- • Dizziness
- • Fatigue
- • Nausea or vomiting
- • Blurred vision
- • Sleepiness
- • Dizziness
- • Abnormal coordination
- • Tremor
- Seizure 2,902
- Using the medicine for a condition it's not approved for 1,036
- The medicine is not working 896
- Tiredness 518
- Sleepiness 442
- Seizure 2,570
- Medicine not working 1,374
- Missed dose of medicine 990
- Death 855
- Sleepiness 553
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.
Vigabatrin can cause permanent vision loss. This includes tunnel vision, which can be disabling. The risk of vision loss increases with higher doses and longer use. Vision loss may not be noticed until it is severe. Regular vision checks are needed while taking this medicine. Because of the risk of permanent vision loss, vigabatrin is only available through a special program called the Vigabatrin REMS Program.
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.
Vigabatrin may cause harm to an unborn baby. If you are pregnant or plan to become pregnant, talk to your doctor. There is a pregnancy registry for women who take anti-epileptic drugs like vigabatrin during pregnancy. Vigabatrin passes into breast milk, so talk to your doctor about whether to breastfeed.
How to Read This brivaracetam vs vigabatrin Comparison
brivaracetam is classified in the Anticonvulsant (SV2A Ligand) drug class, while vigabatrin sits within the Anticonvulsant (GABA Transaminase 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 5,794 submissions while vigabatrin has 6,342. 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 substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between brivaracetam and vigabatrin — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.