Bosentan 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
Bosentan
No brand names on recordCariprazine
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.
Bosentan can speed up how your body handles cariprazine (Vraylar). Bosentan turns up an enzyme called CYP3A4, and that same enzyme is what builds up and breaks down cariprazine's active forms. Because of that, the amount of active medicine in your body could shift, and honestly the exact result has not been well studied, so it is hard to predict.
The bottom line is that this pairing is generally not recommended. Please don't stop or change either medicine on your own. Instead, let your doctor or pharmacist know you take both so they can decide the safest plan and watch how you're doing.
Mechanism: Bosentan is a moderate CYP3A4 inducer; cariprazine and its active metabolites (desmethyl- and didesmethyl-cariprazine) are CYP3A4 substrates, with CYP3A4 mediating both formation and elimination of these active moieties.
- Direction/magnitude: Net effect on cariprazine exposure is unclear and has not been formally evaluated; both reduced efficacy and altered active-metabolite balance are theoretically possible.
- Evidence: Theoretical.
- Onset: Unspecified (enzyme induction is typically delayed, over days to weeks).
- Management: Coadministration is not recommended. If unavoidable, monitor closely for loss of antipsychotic efficacy or changes in tolerability; consider an alternative agent in consultation with the care team.
What happens
Effects on the cariprazine exposure has not been evaluated and the net effect is unclear
Interaction Deep Dive
Taking cariprazine (which is metabolized by CYP3A4) together with a CYP3A4 inducer is advised against. The generation and clearance of cariprazine's active metabolites depend on CYP3A4. It remains unclear what the overall consequence would be, since the influence of CYP3A4 inducers on cariprazine exposure has not been studied1.
Why it happens (mechanism)
Induction of CYP3A4-mediated metabolism of cariprazine
How to manage this interaction
Because the combined effect is uncertain, this pairing is generally not recommended, but your care team can manage it if both are needed.
- Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise.
- Your team may monitor you more closely for signs your cariprazine is working less well (returning symptoms) or for any new side effects.
- They may consider adjusting your plan or choosing an alternative medicine.
Tell your pharmacist or prescriber that you take both drugs, and report any change in mood, symptoms, or how you feel.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Bosentan and Cariprazine together?
Bosentan may change how much active cariprazine is in your body by speeding up its breakdown, and since the net effect is unclear this combo is not recommended. Talk to your doctor or pharmacist before making any changes. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Bosentan 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 Bosentan and Cariprazine interaction managed?
Because the combined effect is uncertain, this pairing is generally not recommended, but your care team can manage it if both are needed. Keep taking both as prescribed unless your doctor or pharmacist tells you otherwise. Your team may monitor you more closely for signs your cariprazine is working less well (returning symptoms) or for any new side effects. They may consider adjusting your plan or… 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 Bosentan 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 Bosentan
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