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Drug interactions

Azathioprine + Ciltacabtagene autoleucel

Severity: Major

Azathioprine and Ciltacabtagene autoleucel: major interaction.

Last updated

For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.

Summary

Azathioprine may impair T-cell function and reduce CAR-T cell expansion and efficacy. It also increases the risk of infection during the cytopenic period after CAR-T therapy.

What this interaction means in plain words

Azathioprine and Ciltacabtagene autoleucel can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.

Azathioprine belongs to Gastrointestinal Tract; Ciltacabtagene autoleucel belongs to Miscellaneous.

Evidence level: Low

Why it happens

Immunosuppressive antimetabolite activity against lymphocytes may reduce CAR-T cell expansion and persistence.

What to do

Discontinue azathioprine before leukapheresis and infusion as directed by the treating center. Monitor for infection if it must continue.

What to ask your pharmacist

  • Does the benefit of taking both outweigh the risk in my case?
  • Do I need any blood test, ECG or other check while on both?
  • What early warning signs should I watch for, and what should I do if they appear?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Frequently asked questions

Can I take Azathioprine with Ciltacabtagene autoleucel?

MediHelp rates the interaction as major. Azathioprine and Ciltacabtagene autoleucel can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Azathioprine may impair T-cell function and reduce CAR-T cell expansion and efficacy. It also increases the risk of infection during the cytopenic period after CAR-T therapy.

How serious is the interaction between Azathioprine and Ciltacabtagene autoleucel?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Discontinue azathioprine before leukapheresis and infusion as directed by the treating center. Monitor for infection if it must continue.

What other medicines interact with Azathioprine?

MediHelp also lists interactions of Azathioprine with, for example, Adenovirus types 4 and 7 live, Bcg vaccine live, Febuxostat. The full list is on the Azathioprine page.

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