Drug interactions
Levoketoconazole + Mefloquine
Severity: Contraindicated
Levoketoconazole and Mefloquine: contraindicated 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
Levoketoconazole is a strong CYP3A4 inhibitor and also prolongs the QT interval. It can raise mefloquine levels while both drugs add to QT prolongation, which increases the risk of torsades de pointes.
What this interaction means in plain words
Levoketoconazole and Mefloquine are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Levoketoconazole belongs to Endocrine; Mefloquine belongs to Anti Parasitic.
Why it happens
Strong CYP3A4 inhibition raises mefloquine exposure, combined with additive QT prolongation.
What to do
Do not coadminister; use an alternative antimalarial. Remember mefloquine's long half-life when starting levoketoconazole after recent use.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Mefloquine
- Arsenic trioxide + Mefloquine Contraindicated
- Dronedarone + Mefloquine Contraindicated
- Ibutilide + Mefloquine Contraindicated
- Mefloquine + Nilotinib Contraindicated
- Mefloquine + Pimozide Contraindicated
- Mefloquine + Quinidine Contraindicated
Other interactions of Levoketoconazole
- Alfuzosin + Levoketoconazole Contraindicated
- Alprazolam + Levoketoconazole Contraindicated
- Amiodarone + Levoketoconazole Contraindicated
- Avanafil + Levoketoconazole Contraindicated
- Cisapride + Levoketoconazole Contraindicated
- Clarithromycin + Levoketoconazole Contraindicated
Frequently asked questions
Can I take Levoketoconazole with Mefloquine?
MediHelp rates the interaction as contraindicated. Levoketoconazole and Mefloquine are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Levoketoconazole is a strong CYP3A4 inhibitor and also prolongs the QT interval. It can raise mefloquine levels while both drugs add to QT prolongation, which increases the risk of torsades de pointes.
How serious is the interaction between Levoketoconazole and Mefloquine?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not coadminister; use an alternative antimalarial. Remember mefloquine's long half-life when starting levoketoconazole after recent use.
What other medicines interact with Mefloquine?
MediHelp also lists interactions of Mefloquine with, for example, Arsenic trioxide, Dronedarone, Ibutilide. The full list is on the Mefloquine page.
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