Cariprazine and Etravirine: 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
Etravirine
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.
Here's what's going on: Etravirine (Intelence) is an HIV medicine that can speed up a liver enzyme called CYP3A4. Your body uses that same enzyme to both create and clear the active forms of cariprazine (Vraylar), the medicine that helps steady mood or thinking.
Because etravirine can rev up that enzyme, it may shift how much active cariprazine ends up in your body. Honestly, the exact result hasn't been studied, so we can't say for sure whether cariprazine ends up too weak or off in some other way. That's why doctors generally don't recommend using them together. The good news is your care team can plan around this, so please talk with your pharmacist or doctor before making any changes.
Mechanism: Etravirine is a CYP3A4 inducer; cariprazine and its active metabolites (DCAR, DDCAR) are CYP3A4 substrates, with CYP3A4 driving both formation and elimination of the active moieties.
Direction/magnitude: Net effect on cariprazine exposure is unclear and not formally evaluated, since induction affects both activation and clearance. Concurrent use is not recommended.
- Onset: unspecified (induction typically develops over days to weeks)
- Evidence: theoretical
- Management: avoid the combination if possible; if co-prescribed, monitor closely for altered antipsychotic response (efficacy loss or shifting effect) and individualize dosing with the care team.
What happens
Effects on the cariprazine exposure has not been evaluated and the net effect is unclear
Interaction Deep Dive
The concurrent use of cariprazine (which is a CYP3A4 substrate) with a CYP3A4 inducer is advised against. The active metabolites of cariprazine depend on CYP3A4 for both their generation and clearance. How CYP3A4 inducers influence cariprazine exposure has not been studied, so the overall effect remains uncertain1.
Why it happens (mechanism)
Induction of CYP3A4-mediated metabolism of cariprazine
How to manage this interaction
What your care team may do:
- Because this pairing is generally not recommended, your prescriber may consider an alternative to one of the medicines.
- If you do need both, your dose may be adjusted and individualized by your care team, and they may monitor you more closely to be sure cariprazine is still working the way it should.
What you should do:
- Keep taking both exactly as prescribed unless your doctor tells you otherwise.
- Let your pharmacist or prescriber know you take both, and report any return or worsening of the symptoms cariprazine was meant to control.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Cariprazine and Etravirine together?
Etravirine can speed up the enzyme that handles cariprazine, and the overall effect on cariprazine is uncertain, so this combination generally isn't recommended. Don't stop or change either drug on your own; ask your pharmacist or doctor how to handle it. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Cariprazine and Etravirine 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 Etravirine interaction managed?
What your care team may do: Because this pairing is generally not recommended, your prescriber may consider an alternative to one of the medicines. If you do need both, your dose may be adjusted and individualized by your care team, and they may monitor you more closely to be sure cariprazine is still working the way it should. What you should do: Keep taking both exactly as prescribed unless your… 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 Etravirine 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 Etravirine
Keep reading about Cariprazine
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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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