Drug interactions
Dexamethasone-tobramycin + Lovastatin
Severity: Minor
Dexamethasone-tobramycin and Lovastatin: 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
Systemic dexamethasone is a weak-to-moderate CYP3A4 inducer and may lower lovastatin exposure, potentially reducing its lipid-lowering effect. With a topical or ophthalmic dexamethasone-tobramycin product, systemic exposure is minimal and the effect is unlikely to be meaningful.
What this interaction means in plain words
Dexamethasone-tobramycin and Lovastatin 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-tobramycin belongs to Anti Bacterial; Lovastatin belongs to Cardiovascular.
Why it happens
Dexamethasone induces CYP3A4, increasing the metabolism of lovastatin, a sensitive CYP3A4 substrate.
What to do
No routine action is needed for short-term or topical use; if prolonged systemic dexamethasone is given, check lipid response and adjust the statin dose if needed.
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
Other interactions of Lovastatin
- Atazanavir + Lovastatin Contraindicated
- Clarithromycin + Lovastatin Contraindicated
- Cobicistat + Lovastatin Contraindicated
- Conivaptan + Lovastatin Contraindicated
- Darunavir + Lovastatin Contraindicated
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Lovastatin Contraindicated
Frequently asked questions
Can I take Dexamethasone-tobramycin with Lovastatin?
MediHelp rates the interaction as minor. Dexamethasone-tobramycin and Lovastatin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Systemic dexamethasone is a weak-to-moderate CYP3A4 inducer and may lower lovastatin exposure, potentially reducing its lipid-lowering effect. With a topical or ophthalmic dexamethasone-tobramycin product, systemic exposure is minimal and the effect is unlikely to be meaningful.
How serious is the interaction between Dexamethasone-tobramycin and Lovastatin?
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 routine action is needed for short-term or topical use; if prolonged systemic dexamethasone is given, check lipid response and adjust the statin dose if needed.
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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