Drug interactions
Busulfan + Tofacitinib
Severity: Major
Busulfan and Tofacitinib: 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
Busulfan produces profound myelosuppression and immunosuppression, which tofacitinib may compound. This raises the risk of severe infection and cytopenias.
What this interaction means in plain words
Busulfan and Tofacitinib 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.
Busulfan belongs to Oncology; Tofacitinib belongs to Musculoskeletal.
Why it happens
Additive immunosuppression and bone marrow suppression.
What to do
Avoid combined use where possible and hold tofacitinib around busulfan conditioning. Monitor blood counts and infection closely.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Busulfan and Tofacitinib, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
References
Other interactions of Tofacitinib
- Baricitinib + Tofacitinib Contraindicated
- Cladribine + Tofacitinib Contraindicated
- Tofacitinib + Upadacitinib Contraindicated
- Abatacept + Tofacitinib Major
- Anti-thymocyte + Tofacitinib Major
- Antithymocyte globulin equine + Tofacitinib Major
Other interactions of Busulfan
- Busulfan + Carboplatin Major
- Busulfan + Chlorambucil Major
- Busulfan + Cyclophosphamide Major
- Busulfan + Fingolimod Major
- Busulfan + Hydroxycarbamide Major
- Busulfan + Ifosfamide Major
Frequently asked questions
Can I take Busulfan with Tofacitinib?
MediHelp rates the interaction as major. Busulfan and Tofacitinib 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. Busulfan produces profound myelosuppression and immunosuppression, which tofacitinib may compound. This raises the risk of severe infection and cytopenias.
How serious is the interaction between Busulfan and Tofacitinib?
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 combined use where possible and hold tofacitinib around busulfan conditioning. Monitor blood counts and infection closely.
What other medicines interact with Tofacitinib?
MediHelp also lists interactions of Tofacitinib with, for example, Baricitinib, Cladribine, Upadacitinib. The full list is on the Tofacitinib page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
