Drug interactions
Carbamazepine + Isotretinoin
Severity: Moderate
Carbamazepine and Isotretinoin: moderate 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
Isotretinoin has been reported to lower carbamazepine concentrations, which could reduce seizure or mood control. Isotretinoin may also cause mood changes, which matters in patients with psychiatric indications.
What this interaction means in plain words
Carbamazepine and Isotretinoin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Carbamazepine belongs to Central Nervous System; Isotretinoin belongs to Dermatology.
Why it happens
The mechanism is not established; the legacy suggestion of increased renal clearance is unproven.
What to do
Monitor carbamazepine serum concentrations and seizure or mood control after starting isotretinoin. Adjust the carbamazepine dose as needed.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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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 Isotretinoin
- Demeclocycline + Isotretinoin Contraindicated
- Isotretinoin + Minocycline Contraindicated
- Isotretinoin + Oxytetracycline Contraindicated
- Isotretinoin + Palovarotene Contraindicated
- Aminolevulinic acid + Isotretinoin Major
- Doxycycline + Isotretinoin Major
Frequently asked questions
Can I take Carbamazepine with Isotretinoin?
MediHelp rates the interaction as moderate. Carbamazepine and Isotretinoin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Isotretinoin has been reported to lower carbamazepine concentrations, which could reduce seizure or mood control. Isotretinoin may also cause mood changes, which matters in patients with psychiatric indications.
How serious is the interaction between Carbamazepine and Isotretinoin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor carbamazepine serum concentrations and seizure or mood control after starting isotretinoin. Adjust the carbamazepine dose as needed.
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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