Tetrabenazine and Risperidone Interaction
Drug interaction information between Tetrabenazine and Risperidone.
Tetrabenazine and Risperidone have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Tetrabenazine and Risperidone. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
These medications both block dopamine, which can lead to movement disorders like tremors or a life-threatening reaction.
What To Do
Tell your doctor immediately if you notice muscle stiffness, restlessness, or a high fever.
FDA Label Information
7.6 Neuroleptic Drugs The risk for Parkinsonism, NMS, and akathisia may be increased by concomitant use of tetrabenazine and dopamine antagonists or antipsychotics (e.g., chlorpromazine, haloperidol, olanzapine, risperidone, thioridazine, ziprasidone) [see Warnings and Precautions ( 5.4 , 5.5 , 5.6 )] .
Tetrabenazine Also Interacts With
- Deutetrabenazine major
- Valbenazine major
- Olanzapine moderate
- Ziprasidone moderate
- Haloperidol moderate
Risperidone Also Interacts With
- Amitriptyline major
- Carbamazepine major
- Lithium major
- Erythromycin major
- Ranitidine major
Frequently Asked Questions
Can I take Tetrabenazine and Risperidone together?
This is a moderate interaction. Tell your doctor immediately if you notice muscle stiffness, restlessness, or a high fever.
How serious is the interaction between Tetrabenazine and Risperidone?
This interaction is classified as "moderate" severity by the FDA. Moderate interactions may worsen your condition or change how your medications work.
Why do Tetrabenazine and Risperidone interact?
These medications both block dopamine, which can lead to movement disorders like tremors or a life-threatening reaction.
Understanding the Tetrabenazine and Risperidone Interaction
FDA-approved prescribing information for these two drugs flags their combination as a moderate-severity interaction. Tetrabenazine belongs to the VMAT2 Inhibitor class and Risperidone belongs to the Atypical Antipsychotic class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: These medications both block dopamine, which can lead to movement disorders like tremors or a life-threatening reaction. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Tetrabenazine has 16 total documented interactions on file in this dataset, and Risperidone has 20. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Tell your doctor immediately if you notice muscle stiffness, restlessness, or a high fever. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Tetrabenazine or Risperidone based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.