Drug interactions
Dexamethasone + Lenacapavir
Severity: Moderate
Dexamethasone 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 systemic dexamethasone exposure. Higher corticosteroid levels can lead to Cushing-type effects, hyperglycemia and adrenal suppression, particularly with prolonged use.
What this interaction means in plain words
Dexamethasone 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 belongs to Endocrine; Lenacapavir belongs to Anti Virals.
Why it happens
Lenacapavir inhibits CYP3A4, reducing the metabolic clearance of dexamethasone.
What to do
Start dexamethasone at the lowest effective dose and titrate according to response. Monitor for signs of corticosteroid excess and adrenal suppression during longer courses.
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
- Bcg vaccine live + Dexamethasone Contraindicated
- Dexamethasone + Mifepristone Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexamethasone + Smallpox vaccine live Contraindicated
- Dexamethasone + Varicella virus vaccine live Contraindicated
- Dexamethasone + Yellow fever vaccine Contraindicated
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 with Lenacapavir?
MediHelp rates the interaction as moderate. Dexamethasone 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 systemic dexamethasone exposure. Higher corticosteroid levels can lead to Cushing-type effects, hyperglycemia and adrenal suppression, particularly with prolonged use.
How serious is the interaction between Dexamethasone 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 according to response. Monitor for signs of corticosteroid excess and adrenal suppression during longer courses.
What other medicines interact with Dexamethasone?
MediHelp also lists interactions of Dexamethasone with, for example, Bcg vaccine live, Mifepristone, Rilpivirine. The full list is on the Dexamethasone page.
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