Drug interactions
Dexamethasone-tobramycin + Levonorgestrel intrauterine
Severity: Minor
Dexamethasone-tobramycin and Levonorgestrel intrauterine: 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 may induce CYP3A4 and lower systemic levonorgestrel, but the intrauterine system acts mainly locally, so contraceptive efficacy is unlikely to be affected.
What this interaction means in plain words
Dexamethasone-tobramycin and Levonorgestrel intrauterine 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
Dexamethasone induces CYP3A4, but local intrauterine delivery limits dependence on systemic levels.
What to do
No change in therapy is usually needed. Reassure patients that the intrauterine system's contraceptive effect is maintained.
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?
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Other interactions of Dexamethasone-tobramycin
Frequently asked questions
Can I take Dexamethasone-tobramycin with Levonorgestrel intrauterine?
MediHelp rates the interaction as minor. Dexamethasone-tobramycin and Levonorgestrel intrauterine 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 may induce CYP3A4 and lower systemic levonorgestrel, but the intrauterine system acts mainly locally, so contraceptive efficacy is unlikely to be affected.
How serious is the interaction between Dexamethasone-tobramycin and Levonorgestrel intrauterine?
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 therapy is usually needed. Reassure patients that the intrauterine system's contraceptive effect is maintained.
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.
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