Drug interactions
Dexamethasone + Istradefylline
Severity: Minor
Dexamethasone and Istradefylline: 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
At the higher 40 mg daily dose, istradefylline may raise dexamethasone exposure. This could increase steroid adverse effects.
What this interaction means in plain words
Dexamethasone and Istradefylline 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 belongs to Endocrine; Istradefylline belongs to Central Nervous System.
Why it happens
Istradefylline at higher doses inhibits CYP3A4 and P-glycoprotein.
What to do
Limit istradefylline to 20 mg daily if possible, and monitor for corticosteroid adverse effects.
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
- 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 Istradefylline
Frequently asked questions
Can I take Dexamethasone with Istradefylline?
MediHelp rates the interaction as minor. Dexamethasone and Istradefylline have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. At the higher 40 mg daily dose, istradefylline may raise dexamethasone exposure. This could increase steroid adverse effects.
How serious is the interaction between Dexamethasone and Istradefylline?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Limit istradefylline to 20 mg daily if possible, and monitor for corticosteroid adverse effects.
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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