Drug Interaction Report

Dolasetron Injection and Paliperidone: Interaction Details

A pharmacist-reviewed analysis of the Dolasetron Injection and Paliperidone interaction: the documented clinical effects, severity rating, onset, mechanism, and management considerations, with cited references throughout.

AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature

Paliperidone

Erzofri Invega
+

Dolasetron Injection

Anzemet Anzemet® Injection
Dr. Brian Staiger, PharmD, BCPS
Medically reviewed by
Dr. Brian Staiger, PharmD, BCPS
Updated Aug 8, 2026
Editorial policy · Data sources
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Interaction severity
Major
Potentially serious — often needs a change or close monitoring.
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.

Of 296 documented Dolasetron Injection interactions, 278 are rated major — including this one.
Worried about symptoms right now? Contact your pharmacist or prescriber, or call Poison Control at 1-800-222-1222 (US). Call 911 for an emergency.
Onset
unspecified
Evidence
theoretical
Severity
Major

What happens

An increased risk of QT interval prolongation and torsade de pointes

Interaction Deep Dive

Both dolasetron and paliperidone may prolong QT interval21. Avoid paliperidone use in combination with other QTc prolonging drugs, such as dolasetron. Certain circumstances may increase the risk of the occurrence of torsades de pointes and/or sudden death in association with the use of drugs that prolong the QTc interval 34.

Why it happens (mechanism)

Additive QT interval prolongation

Common questions

Can I take Dolasetron Injection and Paliperidone together?

An increased risk of QT interval prolongation and torsade de pointes Always confirm with your pharmacist or prescriber before making any change.

How serious is the Dolasetron Injection and Paliperidone 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 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 Dolasetron Injection or Paliperidone 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 (4)

  1. Product Information: ANZEMET(R) IV injection, dolasetron mesylate IV injection. Sanofi-Aventis U.S. LLC (per FDA), Bridgewater, NJ, 2011.
  2. Product Information: INVEGA(R) SUSTENNA(R) extended-release intramuscular injection solution, paliperidone palmitate extended-release intramuscular injection solution. Janssen, Division of Ortho-McNeil-Janssen Pharmaceuticals, Inc. (per FDA), Titusville, NJ, 2011. DailyMed
  3. Product Information: ERZOFRI(R) intramuscular extended-release injectable suspension, paliperidone palmitate intramuscular extended-release injectable suspension. Luye Pharma (USA) Ltd (per FDA), Princeton, NJ, 2024.
  4. Product Information: INVEGA SUSTENNA(R) intramuscular extended-release injectable suspension, paliperidone palmitate intramuscular extended-release injectable suspension. Janssen Pharmaceuticals Inc (per FDA), Titusville, NJ, 2021.
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Paliperidone

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Beyond drug–drug

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:

Paliperidone + Activated Charcoal American Hellebore Arsenic Cesium Ephedra Grapefruit Indian Snakeroot Rauvolfia Vomitoria + 56 more

major · moderate · minor — check everything you take with our drug–supplement interaction checker.

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This information is for education, not a substitute for professional medical advice. Do not start, stop, or change any medication without talking to your pharmacist or prescriber.