Pretomanid and Cariprazine: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 16, 2026 · Source data updated Jul 16, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Cariprazine
Pretomanid
No brand names on record
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.
Cariprazine (Vraylar) is a medicine for mood and psychotic conditions, and your body relies on a liver enzyme called CYP3A4 to both switch it on (form its active pieces) and later clear it out. Pretomanid can speed up that same enzyme.
Because this enzyme does two opposite jobs for cariprazine, experts have not measured exactly how the combination shakes out, so the net effect is uncertain. That is why the manufacturer says using them together is not recommended. This is based on theory, not on a real-world study, so please don't stop either drug on your own. Just let your pharmacist or doctor know you take both so they can plan the safest option and watch how you're doing.
Mechanism: Cariprazine is a CYP3A4 substrate; CYP3A4 both forms its active metabolites (DCAR, DDCAR) and eliminates them. Pretomanid is a CYP3A4 inducer.
- Direction/magnitude: Net effect on cariprazine exposure is unpredictable because the same enzyme mediates both activation and clearance; not formally evaluated.
- Onset: Unspecified (enzyme induction is typically delayed, days to weeks).
- Evidence: Theoretical.
- Management: Coadministration is not recommended per labeling. If unavoidable, monitor closely for altered efficacy or emergent adverse effects; dose may need individualization by the care team.
What happens
Effects on the cariprazine exposure has not been evaluated and the net effect is unclear
Interaction Deep Dive
It is advised against giving cariprazine (which is metabolized by CYP3A4) together with a CYP3A4 inducer. The generation and clearance of cariprazine's active metabolites depend on CYP3A4. How CYP3A4 inducers influence cariprazine exposure has not been studied, so the overall outcome remains uncertain1.
Why it happens (mechanism)
Induction of CYP3A4-mediated metabolism of cariprazine
How to manage this interaction
The drug labeling says combining cariprazine with a CYP3A4 inducer like pretomanid is not recommended, mainly because the overall effect on cariprazine hasn't been studied.
- Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Do not start or stop either one on your own.
- Tell your pharmacist and doctor that you take both so they can decide whether an alternative is a better fit.
- Your care team may choose to monitor you more closely and adjust your treatment based on how you respond.
- Report any new or worsening symptoms, or a return of the symptoms cariprazine treats.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Pretomanid and Cariprazine together?
Using cariprazine with pretomanid is not recommended because pretomanid can change how cariprazine is processed and the overall effect is unpredictable; keep taking both as prescribed and ask your pharmacist or doctor whether an alternative is safer. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Pretomanid and Cariprazine 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 is the Pretomanid and Cariprazine interaction managed?
The drug labeling says combining cariprazine with a CYP3A4 inducer like pretomanid is not recommended, mainly because the overall effect on cariprazine hasn't been studied. Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Do not start or stop either one on your own. Tell your pharmacist and doctor that you take both so they can decide whether an alternative is a b… Management is individual — always follow your own care team's guidance.
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 Pretomanid or Cariprazine 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 (1)
- Product Information: VRAYLAR(R) oral capsules, cariprazine oral capsules. AbbVie Inc. (per FDA), North Chicago, IL, 2024. DailyMed
Keep reading about Cariprazine
Keep reading about Pretomanid
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