Drug interactions
Clarithromycin + Levoketoconazole
Severity: Contraindicated
Clarithromycin and Levoketoconazole: 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 that can raise clarithromycin levels, and both drugs prolong the QT interval. Levoketoconazole is contraindicated with other QT-prolonging CYP3A4 substrates, so the combination carries a serious arrhythmia risk.
What this interaction means in plain words
Clarithromycin and Levoketoconazole 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.
Clarithromycin belongs to Anti Bacterial; Levoketoconazole belongs to Endocrine.
Why it happens
CYP3A4 inhibition increases clarithromycin exposure, with additive QT prolongation.
What to do
Do not co-administer; use a non-QT-prolonging antibiotic that is not a CYP3A4 substrate or inhibitor.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Clarithromycin and Levoketoconazole, 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 14 days on the web. No card needed.
Other interactions of Clarithromycin
- Astemizole + Clarithromycin Contraindicated
- Avanafil + Clarithromycin Contraindicated
- Cisapride + Clarithromycin Contraindicated
- Clarithromycin + Colchicine Contraindicated
- Clarithromycin + Conivaptan Contraindicated
- Clarithromycin + Dihydroergotamine Contraindicated
Other interactions of Levoketoconazole
- Alfuzosin + Levoketoconazole Contraindicated
- Alprazolam + Levoketoconazole Contraindicated
- Amiodarone + Levoketoconazole Contraindicated
- Avanafil + Levoketoconazole Contraindicated
- Cisapride + Levoketoconazole Contraindicated
- Colchicine + Levoketoconazole Contraindicated
Frequently asked questions
Can I take Clarithromycin with Levoketoconazole?
MediHelp rates the interaction as contraindicated. Clarithromycin and Levoketoconazole 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 that can raise clarithromycin levels, and both drugs prolong the QT interval. Levoketoconazole is contraindicated with other QT-prolonging CYP3A4 substrates, so the combination carries a serious arrhythmia risk.
How serious is the interaction between Clarithromycin and Levoketoconazole?
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 co-administer; use a non-QT-prolonging antibiotic that is not a CYP3A4 substrate or inhibitor.
What other medicines interact with Clarithromycin?
MediHelp also lists interactions of Clarithromycin with, for example, Astemizole, Avanafil, Cisapride. The full list is on the Clarithromycin 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.
