Drug interactions
Carbamazepine + Folic acid
Severity: Minor
Carbamazepine and Folic acid: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Carbamazepine can reduce serum folate concentrations during long-term therapy. Folate deficiency may cause macrocytosis or anemia and is relevant in pregnancy because of neural tube defect risk.
What this interaction means in plain words
Carbamazepine and Folic acid have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Carbamazepine belongs to Central Nervous System; Folic acid belongs to Miscellaneous.
Why it happens
The mechanism is not clearly established; enzyme induction and impaired folate absorption or metabolism have been proposed.
What to do
Monitor folate status and blood counts in long-term carbamazepine users. Supplement folic acid, particularly in women of childbearing potential.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Carbamazepine and Folic acid, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Carbamazepine
- Artemether / lumefantrine + Carbamazepine Contraindicated
- Cabotegravir + Carbamazepine Contraindicated
- Carbamazepine + Delamanid Contraindicated
- Carbamazepine + Dienogest / estradiol valerate Contraindicated
- Carbamazepine + Doravirine Contraindicated
- Carbamazepine + Elbasvir / grazoprevir Contraindicated
Other interactions of Folic acid
- Ethotoin + Folic acid Moderate
- Folic acid + Fosphenytoin Moderate
- Folic acid + Glucarpidase Moderate
- Folic acid + Methotrexate Moderate
- Folic acid + Pafolacianine Moderate
- Folic acid + Phenobarbital Moderate
Frequently asked questions
Can I take Carbamazepine with Folic acid?
MediHelp rates the interaction as minor. Carbamazepine and Folic acid have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Carbamazepine can reduce serum folate concentrations during long-term therapy. Folate deficiency may cause macrocytosis or anemia and is relevant in pregnancy because of neural tube defect risk.
How serious is the interaction between Carbamazepine and Folic acid?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor folate status and blood counts in long-term carbamazepine users. Supplement folic acid, particularly in women of childbearing potential.
What other medicines interact with Carbamazepine?
MediHelp also lists interactions of Carbamazepine with, for example, Artemether / lumefantrine, Cabotegravir, Delamanid. The full list is on the Carbamazepine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
