Drug interactions
Lemborexant + Tamoxifen
Severity: Minor
Lemborexant and Tamoxifen: 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
Tamoxifen may weakly inhibit CYP3A4 and could raise lemborexant levels, increasing somnolence and next-day impairment.
What this interaction means in plain words
Lemborexant and Tamoxifen have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Lemborexant belongs to Central Nervous System; Tamoxifen belongs to Endocrine.
Why it happens
Weak CYP3A4 inhibition reduces lemborexant clearance.
What to do
Use the lower lemborexant nightly dose recommended for weak CYP3A4 inhibitors if next-day sedation occurs, and counsel on driving.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Lemborexant and Tamoxifen, 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 14 days on the web. No card needed.
Other interactions of Tamoxifen
- Amiodarone + Tamoxifen Major
- Anastrozole + Tamoxifen Major
- Bupropion + Tamoxifen Major
- Carbamazepine + Tamoxifen Major
- Cinacalcet + Tamoxifen Major
- Dacomitinib + Tamoxifen Major
Other interactions of Lemborexant
Frequently asked questions
Can I take Lemborexant with Tamoxifen?
MediHelp rates the interaction as minor. Lemborexant and Tamoxifen have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Tamoxifen may weakly inhibit CYP3A4 and could raise lemborexant levels, increasing somnolence and next-day impairment.
How serious is the interaction between Lemborexant and Tamoxifen?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lower lemborexant nightly dose recommended for weak CYP3A4 inhibitors if next-day sedation occurs, and counsel on driving.
What other medicines interact with Tamoxifen?
MediHelp also lists interactions of Tamoxifen with, for example, Amiodarone, Anastrozole, Bupropion. The full list is on the Tamoxifen 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.
