{"id":"carbamazepine","name":"Carbamazepine (Total)","shortName":"Carbamazepine","aliases":["Carbamazepine","Tegretol","Carbatrol","Carbamazepine Level","CBZ","Carbamazepine, Serum","Carbamazepine, Total","Carbamazepine Total Level","Epitol","Equetro","Tegretol XR"],"abbreviations":["CBZ"],"loinc":[{"code":"3432-2","primary":true},{"code":"14639-9","primary":false},{"code":"74973-9","primary":false}],"specimen":"serum-or-plasma","units":[{"ucum":"ug/mL","display":"mcg/mL"},{"ucum":"mg/L","display":"mg/L"},{"ucum":"umol/L","display":"µmol/L"}],"referenceRanges":[{"population":"Adults","low":4,"high":12,"unit":"ug/mL","unitDisplay":"mcg/mL","note":"Generally accepted therapeutic range of total carbamazepine in plasma, the same in adults and children per the FDA label. ARUP prints the same 4.0 to 12.0 mcg/mL for a pre-dose (trough) sample at steady state, and lists levels above 15 mcg/mL as its toxic range. It describes where most people respond, not a safety cutoff. Some people control seizures below 4 mcg/mL, and some tolerate levels above 12. Label notes plasma levels vary widely between people (0.5 to 25 mcg/mL) with no clear link to daily dose.","sources":[{"title":"Carbamazepine prescribing information (Clinical Pharmacology, Precautions, Warnings)","url":"https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=138d9ed1-2f8e-d19d-e063-6394a90a695d","publisher":"U.S. FDA label via NLM DailyMed (Bionpharma)","year":2026},{"title":"Carbamazepine, Free and Total, Serum or Plasma (ARUP test 2011763)","url":"https://ltd.aruplab.com/Tests/Pub/2011763","publisher":"ARUP Laboratories"},{"title":"Therapeutic Drug Monitoring of Carbamazepine: A 20-Year Observational Study","url":"https://pubmed.ncbi.nlm.nih.gov/34830678/","publisher":"Journal of Clinical Medicine","year":2021}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"Measures how much carbamazepine (Tegretol), a seizure and nerve-pain medicine, is in your blood.","url":"https://bloodtesttracker.com/markers/carbamazepine","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}