What the FDA labels say about taking them together
Carbamazepine and mifepristone
Mifepristone's FDA label of September 25, 2025 names carbamazepine in its drug interactions section; the carbamazepine labels PlainMeds reads (3) do not name mifepristone. The mifepristone label: “Avoid co-administration of mifepristone and CYP3A inducers such as rifampin, rifabutin, rifapentin, phenobarbital, phenytoin, carbamazepine, and St. John's wort.”
Check it at the source: the carbamazepine FDA label on DailyMed (effective August 20, 2026, Novartis Pharmaceuticals Corporation); the mifepristone FDA label on DailyMed (effective September 25, 2025, Corcept Therapeutics Incorporated).
What does the carbamazepine label say about mifepristone?
Carbamazepine's label (effective August 20, 2026) and its 2 other brand-application labels do not name mifepristone in these sections. A label lists what its studies and reports found; it is not a complete list.
Source: FDA drug label (Tegretol), Novartis Pharmaceuticals Corporation, effective August 20, 2026 (SPL set 8d409411-aa9f-4f3a-a52c-fbcb0c3ec053), via openFDA; the full label on DailyMed
What does the mifepristone label say about carbamazepine?
Mifepristone label, drug interactionsAvoid co-administration of mifepristone and CYP3A inducers such as rifampin, rifabutin, rifapentin, phenobarbital, phenytoin, carbamazepine, and St. John's wort.
Source: FDA drug label (Mifepristone), Corcept Therapeutics Incorporated, effective September 25, 2025 (SPL set 63c068cd-9370-460f-829b-70e8c7ebe91e), via openFDA; the full label on DailyMed
These are the labels' own sentences. PlainMeds does not grade interactions; a pharmacist or prescriber can say what they mean for one person's medicines.
Both medicines on the record
| Carbamazepine | Mifepristone | |
|---|---|---|
| Labeled for | Bipolar disorder, Seizures and epilepsy | n/a |
| Boxed warning | Yes | Yes |
| Pharmacy cost (NADAC) | $0.119 per tablet 200 mg tablet | n/a |
| Shortage now | A presentation being discontinued | No current entry |
Source: FDA NDC Directory, CMS NADAC of October 7, 2026 and the FDA Drug Shortage Database (FDA files October 8, 2026)
What next?
- Check more medicines together
- up to five at once