Belumosudil and Cholera Vaccine: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 15, 2026 · Source data updated Jul 11, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Cholera Vaccine
Belumosudil
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.
The cholera vaccine (Vaxchora) is a live vaccine, meaning it uses a weakened form of the bacteria to teach your body how to fight the real thing. Belumosudil (Rezurock) is a medicine that calms down or weakens your immune system, which is exactly what it is supposed to do for your condition.
The concern is that if your immune system is dialed down, the weakened bacteria in the live vaccine could actually take hold and cause an infection instead of just training your body. This is why live vaccines are usually avoided in people whose defenses are lowered. The good news is that your care team can plan the safest timing for any vaccine, so please talk with them before getting one.
Effect: Belumosudil is immunosuppressive; giving the live oral cholera vaccine (Vaxchora) may blunt the protective immune response and, more importantly, permit the attenuated organism to cause active infection.
- Direction: Reduced immunocompetence increases risk from the live vaccine (neither agent is enzymatically activated; this is a pharmacodynamic/immunologic interaction).
- Severity: Major. Evidence: Established. Onset: Unspecified.
- Management: Live vaccines are generally avoided in severely immunocompromised patients. Safety/efficacy of cholera vaccine is not established in this population. Coordinate timing with the care team; some patients in remission with restored immunocompetence and chemotherapy stopped for at least 3 months may be eligible.
What happens
An increased risk of infection by the live vaccine
Interaction Deep Dive
As a rule, live vaccines should not be administered to patients who are severely immunocompromised2. In immunocompromised individuals, neither the safety nor the efficacy of cholera vaccine has been demonstrated3. A live vaccine may be given to patients with leukemia, lymphoma, or other malignancies provided their disease is in remission, their immunocompetence has been restored, and at least 3 months have passed since their chemotherapy was stopped1.
Why it happens (mechanism)
Decreased immune response allows live vaccine to produce infection
How to manage this interaction
What your care team may do:
- Generally avoid live vaccines, including the oral cholera vaccine, while your immune system is suppressed by belumosudil.
- Review your immune status and the timing of your treatment before deciding on any vaccine.
- Consider alternatives or delay vaccination until your immune function has recovered, when appropriate.
What you should do: Keep taking belumosudil exactly as prescribed. Do not schedule or receive the cholera vaccine on your own. Tell your pharmacist or prescriber about any planned travel or vaccines so they can time things safely for you.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Belumosudil and Cholera Vaccine together?
Because belumosudil weakens your immune system, the live cholera vaccine could cause an infection, so it is generally avoided; always clear any vaccine with your care team first. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Belumosudil and Cholera Vaccine 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 Belumosudil and Cholera Vaccine interaction managed?
What your care team may do: Generally avoid live vaccines, including the oral cholera vaccine, while your immune system is suppressed by belumosudil. Review your immune status and the timing of your treatment before deciding on any vaccine. Consider alternatives or delay vaccination until your immune function has recovered, when appropriate. What you should do: Keep taking belumosudil exactly as p… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "established". Well documented — supported by controlled studies or strong clinical data.
Questions for your pharmacist
- Does my dose of Belumosudil or Cholera Vaccine 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 (3)
- Centers for Disease Control and Prevention (CDC): Vaccines & Immunizations: altered immunocompetence. Centers for Disease Control and Prevention (CDC). Atlanta, GA. 2024.
- National Center for Immunization and Respiratory Diseases (NCIRD): Vaccines & immunizations: contraindications and precautions. Centers for Disease Control and Prevention (CDC). Atlanta, GA. 2024.
- Product Information: VAXCHORA(R) oral suspension, cholera vaccine live oral suspension. Emergent Travel Health Inc (per FDA), Redwood City, CA, 2020. DailyMed
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