Drug interactions
Carbamazepine + Cyanocobalamin
Severity: Minor
Carbamazepine and Cyanocobalamin: 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
Long-term carbamazepine therapy has been associated with lower serum vitamin B12 concentrations in some patients. The clinical impact is usually small, but persistent deficiency could contribute to anemia or neuropathy.
What this interaction means in plain words
Carbamazepine and Cyanocobalamin 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; Cyanocobalamin belongs to Miscellaneous.
Why it happens
The mechanism is not well established; altered B12 handling or absorption with chronic enzyme-inducing antiepileptic therapy has been proposed.
What to do
Check serum B12 periodically in long-term carbamazepine users, especially with anemia or neuropathic symptoms. Supplement if levels are low.
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?
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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 Cyanocobalamin
Frequently asked questions
Can I take Carbamazepine with Cyanocobalamin?
MediHelp rates the interaction as minor. Carbamazepine and Cyanocobalamin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Long-term carbamazepine therapy has been associated with lower serum vitamin B12 concentrations in some patients. The clinical impact is usually small, but persistent deficiency could contribute to anemia or neuropathy.
How serious is the interaction between Carbamazepine and Cyanocobalamin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check serum B12 periodically in long-term carbamazepine users, especially with anemia or neuropathic symptoms. Supplement if levels are low.
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.
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