Drug interactions
Busulfan + Thioguanine
Severity: Major
Busulfan and Thioguanine: 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
Long-term combined use has been linked to liver toxicity, including nodular regenerative hyperplasia and esophageal varices with portal hypertension. Both drugs also suppress the bone marrow.
What this interaction means in plain words
Busulfan 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.
Busulfan belongs to Oncology; Thioguanine belongs to Oncology.
Why it happens
Additive hepatotoxicity, with damage to hepatic sinusoidal endothelium, plus additive myelosuppression.
What to do
Avoid combining them where an alternative exists. If they must be combined, monitor liver enzymes, bilirubin and blood counts regularly and stop therapy if hepatic toxicity develops.
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 Thioguanine, 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 14 days on the web. No card needed.
Other interactions of Thioguanine
Other interactions of Busulfan
- Busulfan + Carboplatin Major
- Busulfan + Chlorambucil Major
- Busulfan + Cyclophosphamide Major
- Busulfan + Fingolimod Major
- Busulfan + Hydroxyurea Major
- Busulfan + Ifosfamide Major
Frequently asked questions
Can I take Busulfan with Thioguanine?
MediHelp rates the interaction as major. Busulfan 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. Long-term combined use has been linked to liver toxicity, including nodular regenerative hyperplasia and esophageal varices with portal hypertension. Both drugs also suppress the bone marrow.
How serious is the interaction between Busulfan 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 combining them where an alternative exists. If they must be combined, monitor liver enzymes, bilirubin and blood counts regularly and stop therapy if hepatic toxicity develops.
What other medicines interact with Thioguanine?
MediHelp also lists interactions of Thioguanine with, for example, Adenovirus types 4 and 7 live, Axicabtagene ciloleucel, Belatacept. The full list is on the Thioguanine 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.
