Cariprazine and Rifampin: 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
Rifampin
Cariprazine
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.
Rifampin is a strong "speed-up" signal for a liver system (called CYP3A4) that your body uses to handle cariprazine (Vraylar), your mental health medicine. The tricky part is that this same system both creates and breaks down the active forms of cariprazine, so speeding it up could pull the medicine in different directions. Because of this, the overall effect on how well your Vraylar works is genuinely hard to predict, which is why combining them isn't recommended.
Please don't stop or change either medicine on your own. Talk with your pharmacist or doctor, who can look at your full picture and choose the safest plan for you.
Mechanism: Rifampin is a potent CYP3A4 inducer. Cariprazine is a CYP3A4 substrate, and CYP3A4 mediates both the formation and elimination of its active metabolites (didesmethyl-cariprazine).
- Direction/magnitude: Net effect on cariprazine exposure is unpredictable and has not been formally studied; because CYP3A4 governs both activation and clearance, induction may shift the balance of parent drug and active metabolites in an uncertain way.
- Evidence: Theoretical; severity rated major.
- Onset: Enzyme induction develops over days to weeks.
- Management: Coadministration is not recommended. If unavoidable, monitor closely for altered efficacy or adverse effects and consider an alternative antimicrobial or antipsychotic in consultation with the prescriber.
What happens
Effects on the cariprazine exposure has not been evaluated and the net effect is unclear
Interaction Deep Dive
Using cariprazine (a substrate of CYP3A4) together with a CYP3A4 inducer is not advised. 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 manufacturer does not recommend using cariprazine (Vraylar) together with rifampin, because the effect on your medicine is unpredictable.
- Keep taking both as prescribed until you speak with your care team. Do not start or stop either one on your own.
- Tell your prescriber and pharmacist that you have been prescribed both, so they can decide the best path.
- Your team may choose an alternative medication for one of them, or monitor you more closely for changes in how well the Vraylar controls symptoms and for any new side effects.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Cariprazine and Rifampin together?
Rifampin can unpredictably change how cariprazine (Vraylar) works, so the combination is not recommended; ask your doctor or pharmacist, who may switch a medication or watch you more closely. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Cariprazine and Rifampin 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 Cariprazine and Rifampin interaction managed?
The manufacturer does not recommend using cariprazine (Vraylar) together with rifampin, because the effect on your medicine is unpredictable. Keep taking both as prescribed until you speak with your care team. Do not start or stop either one on your own. Tell your prescriber and pharmacist that you have been prescribed both, so they can decide the best path. Your team may choose an alternative med… 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 Cariprazine or Rifampin 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 Rifampin
Keep reading about Cariprazine
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.
Check another combination
Our instant two-drug interaction checker is almost here.
Still have questions about this combination?
Every question gets a real answer from a licensed pharmacist — free, and usually within a day.
Ask the pharmacist