Mitapivat and Repotrectinib: Interaction Details
AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Mitapivat
Repotrectinib
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
What happens
Reduced repotrectinib exposure, reduced mitapivat exposure and reduced efficacy of mitapivat
Interaction Deep Dive
Avoid coadministration of mitapivat and repotrectinib (moderate CYP3A inducer that is sensitive CYP3A substrates with NTI) as concomitant use reduces both mitapivat and repotrectinib exposure, which reduces efficacy. Consider alternative therapy. If coadministration is required, monitor Hb and titrate beyond 50 mg twice daily if necessary2, but do not exceed 100 mg twice daily 21. If coadministration is required, monitor for loss of therapeutic effect 2.
Why it happens (mechanism)
Induction of CYP3A-mediated metabolism of repotrectinib; induction of CYP3A-mediated metabolism of mitapivat
Literature reports
2 reports — tap to read
a) Coadministration of mitapivat with efavirenz, a moderate CYP3A inducer, decreased mitapivat AUC (0 to 12) and Cmax by 60% and 30%, respectively, following mitapivat 5 or 20 mg twice daily. Additionally, efavirenz decreased mitapivat AUC (0 to 12) and Cmax by 55% and 24%, respectively, following administration of mitapivat 50 mg twice daily 2.
b) In drug interaction studies, coadministration of mitapivat with midazolam (a sensitive CYP3A substrate) decreased midazolam AUC(inf) and Cmax by 21% and 19% with mitapivat 5 mg twice daily, by 43% and 39% with mitapivat 20 mg twice daily, and by 57% and 52% with mitapivat 50 mg twice daily, respectively 2. Similarly, midazolam AUC (inf) and Cmax decreased by 65% and 59%, respectively, with mitapivat 100 mg twice daily 1.
Common questions
Can I take Mitapivat and Repotrectinib together?
Reduced repotrectinib exposure, reduced mitapivat exposure and reduced efficacy of mitapivat Always confirm with your pharmacist or prescriber before making any change.
How serious is the Mitapivat and Repotrectinib interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Mitapivat or Repotrectinib need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (2)
Keep reading about Mitapivat
Keep reading about Repotrectinib
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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