felbamate vs topiramate
Side-by-side comparison of felbamate and topiramate Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Felbatol
Topamax
Felbamate is a medicine used to treat seizures. It is usually only prescribed when other treatments haven't worked well enough due to the risk of serious side effects.
Topiramate is a medicine that can help prevent seizures and migraines. It works by calming the brain.
Felbamate treats partial seizures in adults, both with and without generalization. It is also used as an add-on treatment for seizures related to Lennox-Gastaut syndrome in children. Because of the risk of very serious side effects, you should only use this medicine if other treatments have not worked well enough.
Topiramate can be used alone or with other medicines to treat certain types of seizures in people 2 years and older. These seizures include partial-onset seizures and primary generalized tonic-clonic seizures. It also treats seizures related to Lennox-Gastaut syndrome. Topiramate can also help prevent migraine headaches in people 12 years and older.
Felbamate is an anticonvulsant, meaning it helps to control seizures. The exact way it works in the brain is not fully understood. It is thought to affect certain chemicals in the brain that are involved in seizures.
Topiramate works by reducing the excitability of brain cells. It also increases the activity of a brain chemical called GABA. These actions help to prevent seizures and migraines.
- • Loss of appetite
- • Vomiting
- • Trouble sleeping
- • Feeling sick to your stomach
- • Headache
- • Tingling or numbness
- • Loss of appetite
- • Weight loss
- • Speech problems
- • Tiredness
- Seizure 345
- Medicine not working 251
- Convulsion 124
- Using the medicine for something it's not approved for 115
- Sleepiness 108
- The medicine is not working 10,126
- Using the medicine for something it's not approved for 7,199
- Headache 6,464
- Feeling sick to your stomach 5,710
- Feeling very tired 5,292
Felbamate can cause a severe type of anemia called aplastic anemia. This condition is very serious and can be deadly. Because of this risk, felbamate should only be used if your epilepsy is very severe and other treatments have not worked. Felbamate can also cause liver failure. Talk to your doctor about these risks before starting felbamate.
Topiramate can cause serious side effects. It can cause vision problems, including sudden nearsightedness and glaucoma. It can decrease sweating and increase body temperature, especially in children. It can cause metabolic acidosis (too much acid in the blood). It may increase the risk of suicidal thoughts or actions. It can affect thinking and coordination. It can harm an unborn baby. It can decrease bone mineral density. It can slow growth in children. It can cause serious skin reactions. It can cause kidney stones. If you experience any of these, contact your doctor immediately.
It is not known if felbamate can harm an unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is also not known if felbamate passes into breast milk, so talk to your doctor if you are breastfeeding.
Topiramate can harm your unborn baby. It may cause birth defects like cleft lip or cleft palate. It can also cause the baby to be smaller than normal. If you are pregnant or plan to become pregnant, talk to your doctor about the risks and benefits of taking topiramate.
Also Compare — Nearby Drugs
Compare felbamate with
Compare topiramate with
How to Read This felbamate vs topiramate Comparison
felbamate is classified in the Anticonvulsant drug class, while topiramate sits within the Anticonvulsant class. Because both drugs share the same classification, they are often considered interchangeable in theory — but clinical outcomes rarely track that cleanly. 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, felbamate has 943 submissions while topiramate has 34,791. 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 felbamate and topiramate — 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.