Caspofungin and Dexamethasone Injection: Interaction Details
AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Dexamethasone Injection
Caspofungin
No brand names on record
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
What happens
Reduced caspofungin plasma levels
Interaction Deep Dive
Enhanced clearance of caspofungin may occur during concomitant therapy with dexamethasone, an inducer of drug clearance. Patients may require an increase in dose to 70 mg caspofungin daily1.
Why it happens (mechanism)
Enzyme induction by dexamethasone
Literature reports
1 report — tap to read
a) Combined use of caspofungin and dexamethasone, an inducer of drug clearance, may result in a significant reduction in caspofungin plasma levels. This is based on regression analyses of pharmacokinetic data. It is not known which drug clearance mechanism involved in caspofungin disposition may be inducible 1.
Common questions
Can I take Caspofungin and Dexamethasone Injection together?
Reduced caspofungin plasma levels Always confirm with your pharmacist or prescriber before making any change.
How serious is the Caspofungin and Dexamethasone Injection interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "delayed". Effects tend to build up gradually over days to weeks.
How strong is the evidence for this interaction?
The evidence is graded "probable". Good supporting evidence, though not definitively proven.
Questions for your pharmacist
- Does my dose of Caspofungin or Dexamethasone Injection need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (1)
- Product Information: CANCIDAS(R) IV infusion, caspofungin acetate IV infusion. Merck & Co,Inc, Whitehouse Station, NJ, 2008.
Keep reading about Dexamethasone Injection
Keep reading about Caspofungin
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