Drug interactions
Ketoconazole + Triamcinolone acetonide injectable
Severity: Major
Ketoconazole and Triamcinolone acetonide injectable: major 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
Ketoconazole can increase systemic triamcinolone exposure after injection, leading to Cushing syndrome and adrenal suppression. Cases have occurred with intra-articular and epidural depot injections, with effects that persist for weeks.
What this interaction means in plain words
Ketoconazole and Triamcinolone acetonide injectable can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Ketoconazole inhibits CYP3A4-mediated metabolism of triamcinolone, prolonging corticosteroid exposure.
What to do
Avoid the combination if possible, or use a corticosteroid less dependent on CYP3A4 such as dexamethasone-sparing alternatives like methylprednisolone is not preferred; consider alternative steroids with minimal CYP3A4 reliance.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Ketoconazole
- Alfuzosin + Ketoconazole Contraindicated
- Alprazolam + Ketoconazole Contraindicated
- Avanafil + Ketoconazole Contraindicated
- Conivaptan + Ketoconazole Contraindicated
- Dihydroergotamine intranasal + Ketoconazole Contraindicated
- Dihydroergotamine + Ketoconazole Contraindicated
Frequently asked questions
Can I take Ketoconazole with Triamcinolone acetonide injectable?
MediHelp rates the interaction as major. Ketoconazole and Triamcinolone acetonide injectable can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Ketoconazole can increase systemic triamcinolone exposure after injection, leading to Cushing syndrome and adrenal suppression. Cases have occurred with intra-articular and epidural depot injections, with effects that persist for weeks.
How serious is the interaction between Ketoconazole and Triamcinolone acetonide injectable?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible, or use a corticosteroid less dependent on CYP3A4 such as dexamethasone-sparing alternatives like methylprednisolone is not preferred; consider alternative steroids with minimal CYP3A4 reliance.
What other medicines interact with Ketoconazole?
MediHelp also lists interactions of Ketoconazole with, for example, Alfuzosin, Alprazolam, Avanafil. The full list is on the Ketoconazole page.
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