Lopinavir 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
Lopinavir
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 broken down in your body by an enzyme called CYP3A4. That same enzyme also builds the long-lasting active forms of the drug that do a lot of the work. Lopinavir can change how busy that enzyme is, so the amount of active cariprazine in your body may shift up or down. Honestly, the exact result hasn't been studied, so we can't say for sure which way it goes.
Because of that uncertainty, this combination usually isn't recommended together. Please don't stop or change anything on your own. Talk with your pharmacist or doctor so they can pick the safest plan and watch you closely if you do take both.
Mechanism: Cariprazine is a CYP3A4 substrate; CYP3A4 mediates both formation and elimination of its active metabolites (didesmethyl- and desmethyl-cariprazine). Neither agent is being used here as a prodrug requiring bioactivation.
- Direction/magnitude: Net effect on cariprazine exposure is unpredictable because CYP3A4 governs both activation and clearance; not formally studied.
- Evidence: Theoretical.
- Onset: Unspecified.
- Management: Coadministration of cariprazine with a CYP3A4 modulator is not recommended. If unavoidable, individualize dosing and monitor closely for both loss of efficacy and dose-related adverse effects (EPS, akathisia, sedation).
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 as well as the clearance of cariprazine's active metabolites depend on CYP3A4. 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
The label position is that this pairing generally isn't recommended, mainly because the net effect on cariprazine is not predictable.
- Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Do not adjust doses on your own.
- Tell your care team you take both drugs. They may adjust and individualize your cariprazine dose and monitor you more closely.
- Watch for either too much effect (restlessness, muscle stiffness, tremor, heavy drowsiness) or too little (return of symptoms), and report changes.
- Ask your pharmacist whether an alternative to one of the drugs is appropriate.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Lopinavir and Cariprazine together?
Combining cariprazine (Vraylar) and lopinavir is generally not recommended because the effect on cariprazine levels is unpredictable; keep taking both as prescribed and ask your pharmacist or doctor how they want to manage or monitor it. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Lopinavir 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 Lopinavir and Cariprazine interaction managed?
The label position is that this pairing generally isn't recommended, mainly because the net effect on cariprazine is not predictable. Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Do not adjust doses on your own. Tell your care team you take both drugs. They may adjust and individualize your cariprazine dose and monitor you more closely. Watch for either too mu… 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 Lopinavir 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
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