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oxcarbazepine

Sold as Trileptal, Oxtellar. Class: Carboxamide derivatives. First FDA approval 01/14/2000: 26 years on the US market.

This grade answers one narrow question: how strong is the public evidence and safety record behind this drug, and how clean is its money trail and court record? It is not a verdict on whether the drug is right for you.

B

Score breakdown (82/100)

Safety ×35%
A
Evidence ×25%
D
Regulatory ×15%
B
Money & lawsuits ×15%
B
Options ×10%
A

Safety: 93

Evidence: 57

Regulatory history: 86

Money & lawsuits: 85

Options: 100

What the FDA label says

Approved uses

is indicated for use as monotherapy or adjunctive therapy in the treatment of partial-onset seizures in adults and as monotherapy in the treatment of partial-onset seizures in pediatric patients aged 4 years and above, and as adjunctive therapy in pediatric patients aged 2 years and above with partial-onset seizures. TRILEPTAL is indicated for: Adults: Monotherapy or adjunctive therapy in the treatment of partial-onset seizures Pediatrics: - Monotherapy in the treatment of partial-onset seizures in children 4-16 years - Adjunctive therapy in the treatment of partial-onset seizures in children 2-16 years ( 1 )

Contraindications

is contraindicated in patients with a known hypersensitivity to oxcarbazepine or to any of its components, or to eslicarbazepine acetate [ see Warnings and Precautions (5.2, 5.3) ]. Known hypersensitivity to oxcarbazepine or to any of its components, or to eslicarbazepine acetate ( 4 , 5.2 )

Warnings and precautions

Hyponatremia: Monitor serum sodium levels ( 5.1 ) Cross Hypersensitivity Reaction to Carbamazepine: Discontinue immediately if hypersensitivity occurs ( 5.3 ) Serious Dermatological Reactions: If occurs, consider discontinuation ( 5.4 ) Suicidal Behavior and Ideation: Monitor for suicidal thoughts/behavior ( 5.5 ) Withdrawal of AEDs: Withdraw TRILEPTAL gradually ( 5.6 ) Cognitive/Neuropsychiatric Adverse Reactions: May cause cognitive dysfunction, somnolence, and coordination abnormalities. Use caution when operating machinery ( 5.7 ) Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS)/Multi-Organ Hypersensitivity: Monitor and discontinue if another cause cannot be established ( 5.8 ) Hematologic Events: Consider discontinuing ( 5.9 ) Seizure Control During Pregnancy: Active metabolite may decrease ( 5.10 ) Risk of Seizure Aggravation: Discontinue if occurs ( 5.11 ) 5.1 Hyponatremia Clinically significant hyponatremia (sodium < 125 mmol/L) can develop during TRILEPTAL use. In the 14 controlled epilepsy studies, 2.5% of TRILEPTAL-treated patients (38/1524) had a sodium of less than 125 mmol/L at some point during treatment, compared to no such patients assigned placebo or ...

Adverse reactions (label)

The following serious adverse reactions are described below and elsewhere in the labeling: Hyponatremia [see Warnings and Precautions (5.1)] Anaphylactic Reactions and Angioedema [see Warnings and Precautions (5.2)] Cross Hypersensitivity Reaction to Carbamazepine [see Warnings and Precautions (5.3)] Serious Dermatological Reactions [see Warnings and Precautions (5.4)] Suicidal Behavior and Ideation [see Warnings and Precautions (5. 5 )] Cognitive/Neuropsychiatric Adverse Reactions [see Warnings and Precautions (5. 7 )] Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS)/Multi-Organ Hypersensitivity [see Warnings and Precautions (5. 8 )] Hematologic Events [see Warnings and Precautions (5. 9 )] The most common (≥ 10% more than placebo for adjunctive or low dose for monotherapy) adverse reactions in adults and pediatrics were: dizziness, somnolence, diplopia, fatigue, nausea, vomiting, ataxia, abnormal vision, headache, nystagmus, tremor, and abnormal gait ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Novartis Pharmaceuticals Corporation at 1-888-669-6682 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience Because clinical trials are ...

Recent major label changes

Dosage and Administration ( 2.8 ) 9/2025

Source: FDA SPL label for Trileptal (Novartis Pharmaceuticals Corporation), effective 20251216. Full label on DailyMed.

Side-effect reports sent to the FDA

These are counts of reports people filed, not rates of harm. Anyone can file one, and nobody checks whether the drug was the cause. Millions of doses are taken for every report sent, so the useful part is how this drug compares with the average across all drugs.

23,535reports that mention this drug
23,431of those blame this drug, not another one the person was taking
73%of reports describe a serious outcome, such as a hospital stay (average for all drugs: 57%)
5.9%of reports include a death, from any cause (average for all drugs: 9.1%)

Problems reported most often

Seizure · 2,992Drug Ineffective · 2,548Off Label Use · 1,708Fatigue · 1,264Somnolence · 1,107Dizziness · 1,055Headache · 1,046Fall · 893Nausea · 883Hyponatraemia · 852Epilepsy · 773Vomiting · 759Anxiety · 745Rash · 723Pain · 709

Reports per year

20192020202120222023202420252026
2,1482,4522,0161,6651,7771,7631,725911

3,362 reports blaming this drug for every million Medicare prescriptions filled, which is 1.2× the typical drug on this site. (4,333 reports in 2024–2026, against 1,288,863 Medicare fills in one year. This is the one number here that accounts for how many people take the drug.)

Source: the FDA's Adverse Event Reporting System (FAERS). Reports are voluntary and unverified. Drugs that are prescribed a lot, in the news, or in lawsuits attract more reports, so the percentages are compared with the whole database to correct for that partly, not fully.

Recalls and regulatory record

2recall actions on file
3 / 32brand / generic applications
6label changes since 2021
NoREMS program
DateClassFirmReason
12/2022Class IISUN PHARMACEUTICAL INDUSTRIES INCPresence of foreign substance
01/2014Class IICaraco Pharmaceutical Laboratories Ltd.Failed Tablet Specifications: Broken Tablets Present.

Class I = reasonable probability of serious harm. Class II = temporary or reversible harm. Class III = unlikely to harm. Most generic recalls are manufacturing or labeling defects for one lot, not a verdict on the molecule.

Evidence base

84randomized trials (PubMed)
26systematic reviews
73registered trials
37%of completed trials posted results
12%terminated or withdrawn
52%industry-funded

Independent Cochrane reviews

Counts measure how much evidence exists and how transparent it is, not how big the benefit is. For that, ask your prescriber: if 100 people like me took this, how many would get better because of it, and how many would be harmed? (Doctors call these the "number needed to treat" and "number needed to harm.") It differs by condition and is the number drug ads leave out. Sources: PubMed, ClinicalTrials.gov.

Money and lawsuits

In 2024, drug companies reported $0 in payments to US physicians and hospitals tied to this drug across 0 transactions.

No pending federal MDL names this drug or its brands.

Settlements of federal marketing and pricing allegations

Settlements of $100M+ in which this drug (Trileptal) was a named product, as recorded by the Department of Justice. A settlement resolves allegations; civil settlements are not admissions and not findings of wrongdoing. They are shown because off-label promotion cases describe how the evidence many prescribers saw was shaped.

Sources: CMS Open Payments (Sunshine Act); Judicial Panel on Multidistrict Litigation pending docket list; DOJ settlements as tabulated on Wikipedia with links to the primary record. State-court and individual suits are not included.

Who takes it and what it costs

207,523Medicare Part D patients (2024)
1,288,863prescriptions filled
$92average cost per fill
$118Mtotal Medicare spend
ProductFills$/fill
Oxcarbazepine1,257,078$54
Oxtellar XR18,806$1,513
Trileptal10,640$1,826
Oxcarbazepine ER2,339$1,094

Same-class alternatives

eslicarbazepinerufinamide

Same ATC pharmacological class, graded ones first, best grade at the top. Being in the same class does not make them interchangeable for your condition; it makes them worth asking about.

Questions to ask your prescriber

  1. The maker paid $423 million in 2010 to settle federal allegations about how this drug was marketed. Is my use one of the uses that was promoted improperly?
  2. The most-reported problems in FDA's adverse event data are seizure, fatigue. How would we recognize and handle those?
  3. Off-label use is among the most-reported items for this drug. Is my use on-label, and if not, what evidence supports it?
  4. Why this one over carbamazepine, eslicarbazepine, rufinamide? What would make you pick one of those instead?
  5. What result are we expecting, by when, and what is the plan if it does not happen?
  6. If 100 people like me took this drug, how many would actually get better because of it, and how many would be harmed by it? (Doctors call these the number needed to treat and the number needed to harm.)