carbamazepine vs oxcarbazepine
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 carbamazepine and oxcarbazepine. 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
In addition, carbamazepine causes, or would be expected to cause, decreased levels of the following drugs, for which monitoring of concentrations or dosage adjustment may be necessary: acetaminophen, albendazole, alprazolam, aprepitant, buprenorphone, bupropion, citalopram, clonazepam, clozapine, corticosteroids (e.g., prednisolone, dexamethasone), cyclosporine, dicumarol, dihydropyridine calcium channel blockers (e.g., felodipine), doxycycline, ethosuximide, everolimus, haloperidol, imatinib, itraconazole, lamotrigine, levothyroxine, methadone, methsuximide, mianserin, midazolam,...
Tegretol
Trileptal
Carbamazepine is a medicine used to control seizures and treat nerve pain. It works by reducing abnormal electrical activity in the brain and calming nerve signals.
Oxcarbazepine is a medicine used to treat seizures. It helps to control seizures in adults and children.
Carbamazepine is used to treat certain types of seizures, including partial seizures and generalized tonic-clonic seizures. It can also treat mixed seizure patterns. Carbamazepine also treats the pain from trigeminal neuralgia, a nerve disorder that causes intense facial pain. It is also sometimes used for glossopharyngeal neuralgia.
Oxcarbazepine 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.
Carbamazepine is an anticonvulsant. It works by reducing the spread of seizure activity in the brain. It also stabilizes nerve impulses to reduce pain.
Oxcarbazepine works by reducing the electrical activity in the brain. This helps to prevent seizures. It stabilizes overexcited nerve cells.
- • Dizziness
- • Drowsiness
- • Unsteadiness
- • Nausea
- • Vomiting
- • Dizziness
- • Sleepiness
- • Double vision
- • Feeling tired
- • Nausea
- Seizure 3,609
- Drug Interaction 3,369
- Fall 3,044
- Dizziness 2,862
- Pyrexia 2,689
- Seizure 2,805
- Fatigue 1,607
- Dizziness 1,519
- Convulsion 1,463
- Headache 1,434
Carbamazepine can cause severe skin reactions, including Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN), which can be fatal. If you are of Asian descent, you may need a blood test before starting this medicine. Carbamazepine can also cause serious blood problems like aplastic anemia and agranulocytosis. Contact your doctor right away if you develop a fever, sore throat, rash, or unusual bleeding or bruising.
This medicine can cause low sodium levels in your blood. Your doctor should check your sodium levels, especially if you take other medicines that can also lower sodium. This medicine may cause suicidal thoughts or actions. Contact your doctor right away if you have any sudden changes in mood, thoughts, or feelings.
Carbamazepine may harm an unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if carbamazepine passes into breast milk, so talk to your doctor about breastfeeding.
Oxcarbazepine may harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. There is a pregnancy registry for women who take this medicine during pregnancy. You can enroll by calling 1-888-233-2334.
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How to Read This carbamazepine vs oxcarbazepine Comparison
carbamazepine is classified in the Anticonvulsant drug class, while oxcarbazepine 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, carbamazepine has 15,573 submissions while oxcarbazepine has 8,828. 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 carbamazepine speeds up how your body processes oxcarbazepine, which can lead to lower levels of the drug in your system.. 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 carbamazepine or oxcarbazepine.
Registry boundary: This comparison displays source-record fields and does not provide individualized medical direction.