Raltegravir 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
Raltegravir
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.
Cariprazine (Vraylar) is broken down in your body by a liver enzyme called CYP3A4. This same enzyme also turns cariprazine into its active forms that do the real work. If another medicine speeds up that enzyme, it can throw off how much active medicine you actually have, and the honest truth is we don't have studies telling us exactly which way it tips.
Because cariprazine treats serious conditions where steady levels matter, this is worth flagging. Please don't stop or change either medicine on your own. Your care team can keep an eye on how you're doing and adjust things if needed. Talk with your pharmacist or doctor about this combination.
Mechanism: Cariprazine is a CYP3A4 substrate; CYP3A4 also forms its long-acting active metabolites (DDCAR). A CYP3A4 inducer could theoretically alter both formation and elimination of the parent and active metabolites, so the net effect on active-moiety exposure is unpredictable.
- Direction: Unclear (competing effects on parent vs active metabolites).
- Evidence: Theoretical; not formally evaluated.
- Severity/onset: Major; onset unspecified.
- Note: Raltegravir is primarily UGT1A1-metabolized and is a weak CYP3A inducer at most, so real-world impact may be limited, but combination is labeled not recommended.
Management: Avoid if possible; otherwise monitor clinical response and tolerability closely and individualize dosing.
What happens
Effects on the cariprazine exposure has not been evaluated and the net effect is unclear
Interaction Deep Dive
Giving cariprazine (which is metabolized by 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
Here is how a care team usually handles this:
- The combination is officially not recommended, so your prescriber may consider whether a different option is a better fit.
- If you do take both, your team may monitor you more closely for either weaker symptom control or more side effects, and your cariprazine dose may need to be adjusted and individualized.
What you should do:
- Keep taking both medicines exactly as prescribed unless told otherwise.
- Tell your pharmacist or doctor you take both, and report any new mood changes, restlessness, drowsiness, or return of symptoms.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Raltegravir and Cariprazine together?
Combining cariprazine with a CYP3A4 inducer is labeled not recommended because the effect on cariprazine's active levels is unpredictable; keep taking both as prescribed and ask your pharmacist or doctor whether this pairing is right for you. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Raltegravir 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 Raltegravir and Cariprazine interaction managed?
Here is how a care team usually handles this: The combination is officially not recommended, so your prescriber may consider whether a different option is a better fit. If you do take both, your team may monitor you more closely for either weaker symptom control or more side effects, and your cariprazine dose may need to be adjusted and individualized. What you should do: Keep taking both medicine… 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 Raltegravir 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 Raltegravir
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.
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