Drug interactions
Dutasteride-tamsulosin + Idelalisib
Severity: Major
Dutasteride-tamsulosin and Idelalisib: major 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
Idelalisib is a strong CYP3A inhibitor and can markedly raise tamsulosin exposure. This may cause significant hypotension and syncope.
What this interaction means in plain words
Dutasteride-tamsulosin and Idelalisib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Dutasteride-tamsulosin belongs to Genitourinary; Idelalisib belongs to Oncology.
Why it happens
Strong CYP3A4 inhibition by idelalisib decreases tamsulosin clearance.
What to do
Avoid coadministration and use an alternative BPH therapy where possible. If unavoidable, monitor blood pressure closely.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Dutasteride-tamsulosin and Idelalisib, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Dutasteride-tamsulosin
Other interactions of Idelalisib
- Alfuzosin + Idelalisib Contraindicated
- Cisapride + Idelalisib Contraindicated
- Dihydroergotamine + Idelalisib Contraindicated
- Dronedarone + Idelalisib Contraindicated
- Eletriptan + Idelalisib Contraindicated
- Eplerenone + Idelalisib Contraindicated
Frequently asked questions
Can I take Dutasteride-tamsulosin with Idelalisib?
MediHelp rates the interaction as major. Dutasteride-tamsulosin and Idelalisib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Idelalisib is a strong CYP3A inhibitor and can markedly raise tamsulosin exposure. This may cause significant hypotension and syncope.
How serious is the interaction between Dutasteride-tamsulosin and Idelalisib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid coadministration and use an alternative BPH therapy where possible. If unavoidable, monitor blood pressure closely.
What other medicines interact with Dutasteride-tamsulosin?
MediHelp also lists interactions of Dutasteride-tamsulosin with, for example, Alfuzosin, Amifostine, Atazanavir. The full list is on the Dutasteride-tamsulosin page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
