Drug interactions
Dexamethasone-tobramycin + Lenacapavir
Severity: Moderate
Dexamethasone-tobramycin and Lenacapavir: moderate 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
Lenacapavir inhibits CYP3A4 and may raise dexamethasone concentrations. This increases the risk of corticosteroid toxicity such as adrenal suppression and Cushing syndrome with prolonged use.
What this interaction means in plain words
Dexamethasone-tobramycin and Lenacapavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Dexamethasone-tobramycin belongs to Anti Bacterial; Lenacapavir belongs to Anti Virals.
Why it happens
Lenacapavir inhibits CYP3A4, reducing dexamethasone metabolism.
What to do
Start dexamethasone at the lowest effective dose and titrate based on response. Monitor for signs of corticosteroid excess during prolonged co-therapy.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Dexamethasone-tobramycin
Other interactions of Lenacapavir
- Apalutamide + Lenacapavir Contraindicated
- Carbamazepine + Lenacapavir Contraindicated
- Enzalutamide + Lenacapavir Contraindicated
- Flibanserin + Lenacapavir Contraindicated
- Lenacapavir + Phenytoin Contraindicated
- Lenacapavir + Rifampicin Contraindicated
Frequently asked questions
Can I take Dexamethasone-tobramycin with Lenacapavir?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Lenacapavir can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Lenacapavir inhibits CYP3A4 and may raise dexamethasone concentrations. This increases the risk of corticosteroid toxicity such as adrenal suppression and Cushing syndrome with prolonged use.
How serious is the interaction between Dexamethasone-tobramycin and Lenacapavir?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Start dexamethasone at the lowest effective dose and titrate based on response. Monitor for signs of corticosteroid excess during prolonged co-therapy.
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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