Drug interactions
Fingolimod + Thioguanine
Severity: Major
Fingolimod and Thioguanine: major interaction.
Last updated Sources: US FDA label
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
Thioguanine is a myelosuppressive antimetabolite, and fingolimod reduces circulating lymphocytes. Combined use may increase infection risk.
What this interaction means in plain words
Fingolimod and Thioguanine 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.
Fingolimod belongs to Central Nervous System; Thioguanine belongs to Oncology.
Why it happens
Additive immunosuppression from purine antimetabolite marrow suppression and fingolimod lymphocyte sequestration.
What to do
Avoid combination where possible; if used, monitor complete blood counts and for infection. Consider holding fingolimod during therapy.
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?
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References
Other interactions of Fingolimod
- Adenovirus types 4 and 7 live + Fingolimod Contraindicated
- Bcg vaccine live + Fingolimod Contraindicated
- Fingolimod + Pimozide Contraindicated
- Fingolimod + Ponesimod Contraindicated
- Fingolimod + Quinidine Contraindicated
- Fingolimod + Siponimod Contraindicated
Other interactions of Thioguanine
Frequently asked questions
Can I take Fingolimod with Thioguanine?
MediHelp rates the interaction as major. Fingolimod and Thioguanine 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. Thioguanine is a myelosuppressive antimetabolite, and fingolimod reduces circulating lymphocytes. Combined use may increase infection risk.
How serious is the interaction between Fingolimod and Thioguanine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combination where possible; if used, monitor complete blood counts and for infection. Consider holding fingolimod during therapy.
What other medicines interact with Fingolimod?
MediHelp also lists interactions of Fingolimod with, for example, Adenovirus types 4 and 7 live, Bcg vaccine live, Pimozide. The full list is on the Fingolimod page.
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