Drug interactions
Heparin + Pegaspargase
Severity: Moderate
Heparin and Pegaspargase: 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
Pegaspargase lowers levels of clotting factors and antithrombin and can cause both bleeding and thrombosis. Heparin, which depends on antithrombin, may be less effective, and bleeding risk may be increased.
What this interaction means in plain words
Heparin and Pegaspargase 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.
Heparin belongs to Cardiovascular; Pegaspargase belongs to Oncology.
Why it happens
Asparaginase-induced reduction of coagulation proteins and antithrombin alters hemostasis, adding to the anticoagulant effect of heparin.
What to do
Monitor coagulation parameters, fibrinogen and antithrombin activity, and observe for bleeding or thrombosis. Adjust heparin dosing according to anti-Xa levels rather than aPTT alone.
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 Heparin
- Defibrotide + Heparin Contraindicated
- Heparin + Ketorolac Contraindicated
- Heparin + Oritavancin Contraindicated
- Acemetacin + Heparin Major
- Acetylsalicylic acid + Heparin Major
- Alteplase + Heparin Major
Other interactions of Pegaspargase
- Etodolac + Pegaspargase Major
- Ketorolac + Pegaspargase Major
- Mefenamic acid + Pegaspargase Major
- Acetylsalicylic acid + Pegaspargase Moderate
- Argatroban + Pegaspargase Moderate
- Celecoxib + Pegaspargase Moderate
Frequently asked questions
Can I take Heparin with Pegaspargase?
MediHelp rates the interaction as moderate. Heparin and Pegaspargase 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. Pegaspargase lowers levels of clotting factors and antithrombin and can cause both bleeding and thrombosis. Heparin, which depends on antithrombin, may be less effective, and bleeding risk may be increased.
How serious is the interaction between Heparin and Pegaspargase?
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 coagulation parameters, fibrinogen and antithrombin activity, and observe for bleeding or thrombosis. Adjust heparin dosing according to anti-Xa levels rather than aPTT alone.
What other medicines interact with Heparin?
MediHelp also lists interactions of Heparin with, for example, Defibrotide, Ketorolac, Oritavancin. The full list is on the Heparin page.
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