clonazepam vs felbamate
Side-by-side comparison of clonazepam and felbamate. Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
major Known Drug Interaction
The selective serotonin reuptake inhibitors sertraline (weak CYP3A4 inducer) and fluoxetine (CYP2D6 inhibitor), and the anti-epileptic drug felbamate (CYP2C19 inhibitor and CYP3A4 inducer) do not affect the pharmacokinetics of clonazepam.
Recommendation: These medications can be used together because they do not have a significant interaction.
Klonopin
Felbatol
Clonazepam is a medicine that belongs to the benzodiazepine class. It is used to treat seizure disorders and panic disorder.
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.
Clonazepam is used to treat certain seizure disorders, including Lennox-Gastaut syndrome, akinetic, and myoclonic seizures. It can also treat absence seizures when other medicines don't work. Clonazepam also treats panic disorder, which involves unexpected panic attacks and worry about having more attacks.
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.
Clonazepam works by affecting chemicals in your brain that may be unbalanced. It enhances the effects of a natural brain chemical called GABA. This helps to reduce seizures and relieve panic symptoms.
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.
- • Drowsiness
- • Problems with coordination
- • Loss of appetite
- • Vomiting
- • Trouble sleeping
- • Feeling sick to your stomach
- • Headache
- Tiredness 10,238
- Feeling sick to your stomach 9,567
- Worry or nervousness 8,735
- Head pain 8,596
- Feeling sad or hopeless 8,123
- Seizure 345
- Convulsion 124
- Sleepiness 108
- Condition getting worse 92
- Tiredness 85
Taking clonazepam with opioid medicines can cause very serious problems, including slowed breathing, coma, and death. Only take these medicines together if there are no other options. Clonazepam can be habit-forming, leading to abuse, misuse, and addiction, which can result in overdose or death. Stopping clonazepam suddenly can cause dangerous withdrawal symptoms. Your doctor will slowly lower your dose to prevent withdrawal.
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.
Clonazepam may harm an unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. Clonazepam can pass into breast milk and may harm a nursing infant.
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.
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How to Read This clonazepam vs felbamate Comparison
clonazepam is classified in the Benzodiazepine drug class, while felbamate sits within the Anticonvulsant 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, clonazepam has 45,259 submissions while felbamate has 754. 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 major interaction flagged in FDA labeling, attributed to felbamate does not change the levels of clonazepam in the body or how it is processed.. 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 clonazepam and felbamate - 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.