Drug interactions
Siponimod + Thioguanine
Severity: Moderate
Siponimod and Thioguanine: moderate 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
Thioguanine is a myelosuppressive antimetabolite and siponimod lowers lymphocyte counts. Together they can intensify immunosuppression and raise infection risk.
What this interaction means in plain words
Siponimod and Thioguanine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Siponimod belongs to Central Nervous System; Thioguanine belongs to Oncology.
Why it happens
Additive effects: S1P receptor-mediated lymphocyte sequestration plus purine antimetabolite bone marrow suppression.
What to do
Monitor complete blood counts including lymphocytes and watch for infection. Reduce or hold one agent if severe cytopenia or infection develops.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Siponimod
- Cladribine + Siponimod Contraindicated
- Fingolimod + Siponimod Contraindicated
- Fluconazole + Siponimod Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Siponimod Contraindicated
- Ponesimod + Siponimod Contraindicated
- Siponimod + Thioridazine Contraindicated
Other interactions of Thioguanine
Frequently asked questions
Can I take Siponimod with Thioguanine?
MediHelp rates the interaction as moderate. Siponimod and Thioguanine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Thioguanine is a myelosuppressive antimetabolite and siponimod lowers lymphocyte counts. Together they can intensify immunosuppression and raise infection risk.
How serious is the interaction between Siponimod and Thioguanine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor complete blood counts including lymphocytes and watch for infection. Reduce or hold one agent if severe cytopenia or infection develops.
What other medicines interact with Siponimod?
MediHelp also lists interactions of Siponimod with, for example, Cladribine, Fingolimod, Fluconazole. The full list is on the Siponimod page.
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