Drug interactions
Oxacillin + Rifampin
Severity: Minor
Oxacillin and Rifampin: minor 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
Rifampin is a strong enzyme inducer, but oxacillin is cleared mostly by renal and biliary excretion, so any fall in exposure is likely small. Combined use is common in staphylococcal infections such as prosthetic device infection, and the pairing is considered acceptable.
What this interaction means in plain words
Oxacillin and Rifampin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Possible rifampin-induced increase in oxacillin metabolism, a minor elimination pathway; not well established.
What to do
No dose adjustment is usually needed. Assess clinical response and use standard oxacillin dosing.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Oxacillin and Rifampin, 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 Oxacillin
- Bcg vaccine live + Oxacillin Moderate
- Chloramphenicol + Oxacillin Moderate
- Cholera vaccine + Oxacillin Moderate
- Demeclocycline + Oxacillin Moderate
- Doxycycline + Oxacillin Moderate
- Microbiota + Oxacillin Moderate
Frequently asked questions
Can I take Oxacillin with Rifampin?
MediHelp rates the interaction as minor. Oxacillin and Rifampin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Rifampin is a strong enzyme inducer, but oxacillin is cleared mostly by renal and biliary excretion, so any fall in exposure is likely small. Combined use is common in staphylococcal infections such as prosthetic device infection, and the pairing is considered acceptable.
How serious is the interaction between Oxacillin and Rifampin?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No dose adjustment is usually needed. Assess clinical response and use standard oxacillin dosing.
What other medicines interact with Oxacillin?
MediHelp also lists interactions of Oxacillin with, for example, Bcg vaccine live, Chloramphenicol, Cholera vaccine. The full list is on the Oxacillin 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.
