Drug interactions
Dexamethasone-tobramycin + Ethinylestradiol
Severity: Minor
Dexamethasone-tobramycin and Ethinylestradiol: 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
Dexamethasone is a weak CYP3A4 inducer, but with topical or ophthalmic use systemic exposure is minimal. Any reduction in contraceptive efficacy is unlikely to be clinically relevant.
What this interaction means in plain words
Dexamethasone-tobramycin and Ethinylestradiol 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
Weak CYP3A4 induction by dexamethasone could modestly increase ethinylestradiol clearance.
What to do
No change in contraception is required with topical or ophthalmic use; with prolonged high-dose systemic dexamethasone, consider adding a barrier method.
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 Dexamethasone-tobramycin and Ethinylestradiol, 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 7 days on the web. No card needed.
Other interactions of Dexamethasone-tobramycin
Frequently asked questions
Can I take Dexamethasone-tobramycin with Ethinylestradiol?
MediHelp rates the interaction as minor. Dexamethasone-tobramycin and Ethinylestradiol have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Dexamethasone is a weak CYP3A4 inducer, but with topical or ophthalmic use systemic exposure is minimal. Any reduction in contraceptive efficacy is unlikely to be clinically relevant.
How serious is the interaction between Dexamethasone-tobramycin and Ethinylestradiol?
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 change in contraception is required with topical or ophthalmic use; with prolonged high-dose systemic dexamethasone, consider adding a barrier method.
What other medicines interact with Dexamethasone-tobramycin?
MediHelp also lists interactions of Dexamethasone-tobramycin with, for example, Capreomycin, Carboplatin, Ciprofloxacin. The full list is on the Dexamethasone-tobramycin 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.
