Drug interactions
dexamethasone + metamizole (dipyrone)
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.
Overview
Metamizole induces CYP3A4/2B6 and may lower dexamethasone exposure; dexamethasone also induces CYP3A4 and may reduce metamizole active metabolite levels, decreasing steroid and analgesic effects.
Mechanism of action
Enzyme induction (CYP3A4 and CYP2B6) increases clearance of co-medications, reducing systemic concentrations.
Clinical management
Monitor clinical response to dexamethasone and analgesia; consider dose adjustment or use a non–enzyme-inducing analgesic if inadequate effect. Reassess after starting/stopping metamizole due to induction onset/offset over days.
Drug reference
References
- Dipyrone (metamizole) monograph — Lexicomp
- Dexamethasone Prescribing Information (CYP3A4 interactions) — FDA Label
- Novalgin (metamizole sodium) professional information — enzyme induction (CYP2B6/3A4) — Swissmedic
Frequently asked questions
Can I take dexamethasone with metamizole (dipyrone)?
The interaction is rated: Moderate. Metamizole induces CYP3A4/2B6 and may lower dexamethasone exposure; dexamethasone also induces CYP3A4 and may reduce metamizole active metabolite levels, decreasing steroid and analgesic effects.
How serious is the interaction between dexamethasone and metamizole (dipyrone)?
The interaction is rated: Moderate. Evidence level: Moderate.
How is the interaction between dexamethasone and metamizole (dipyrone) managed?
Monitor clinical response to dexamethasone and analgesia; consider dose adjustment or use a non–enzyme-inducing analgesic if inadequate effect. Reassess after starting/stopping metamizole due to induction onset/offset over days.
Why do dexamethasone and metamizole (dipyrone) interact?
Enzyme induction (CYP3A4 and CYP2B6) increases clearance of co-medications, reducing systemic concentrations.
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