Ticlopidine 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
Ticlopidine
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 a medicine used for mental health conditions like schizophrenia and bipolar disorder. Your body relies on a liver enzyme called CYP3A4 both to turn cariprazine into its active forms and to clear it out. Ticlopidine (Ticlid) can affect that same enzyme system, which may shift how much active cariprazine is in your body. The truth is, this exact combination has not been well studied, so no one can say for sure whether it makes cariprazine stronger or weaker. Because it is hard to predict, this pairing is generally not recommended. The good news: your care team can look at your medicines together and adjust or monitor as needed. Please talk with your pharmacist or doctor before making any changes.
Mechanism: Cariprazine is a CYP3A4 substrate; CYP3A4 governs both the formation and elimination of its active metabolites (didesmethyl-cariprazine). The listed concern is altered CYP3A4-mediated metabolism.
- Direction/magnitude: Net effect on cariprazine exposure is unclear and not formally evaluated, because CYP3A4 both activates and clears the compound.
- Evidence: Theoretical.
- Onset: Unspecified.
- Management: Coadministration is not recommended per labeling. If used, individualize therapy and monitor clinical response and tolerability closely.
Note ticlopidine is primarily a CYP inhibitor rather than a classic inducer, so confirm the specific enzyme effect when assessing this pairing.
What happens
Effects on the cariprazine exposure has not been evaluated and the net effect is unclear
Interaction Deep Dive
Giving cariprazine (which is 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
What your care team may do:
- Because the net effect on cariprazine is unpredictable, this combination is generally not recommended, and your team may consider an alternative.
- If both are needed, your cariprazine dose may need to be individualized and you may be monitored more closely for either reduced benefit or increased side effects.
What you should do:
- Keep taking both medicines exactly as prescribed unless your prescriber tells you otherwise.
- Tell your pharmacist or doctor you are on both, and report any new symptoms, worsening mood, drowsiness, restlessness, or movement changes.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Ticlopidine and Cariprazine together?
Combining cariprazine and ticlopidine is not recommended because the effect on cariprazine levels is unpredictable; do not stop either drug on your own, and ask your pharmacist or doctor to review the pair. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Ticlopidine 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 Ticlopidine and Cariprazine interaction managed?
What your care team may do: Because the net effect on cariprazine is unpredictable, this combination is generally not recommended, and your team may consider an alternative. If both are needed, your cariprazine dose may need to be individualized and you may be monitored more closely for either reduced benefit or increased side effects. What you should do: Keep taking both medicines exactly as pres… 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 Ticlopidine 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 Cariprazine
Keep reading about Ticlopidine
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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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