Drug interactions
Argatroban + Heparin
Severity: Major
Argatroban and Heparin: 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
Both drugs inhibit coagulation, so giving them together raises the risk of serious bleeding. Argatroban also raises the aPTT and INR, which makes heparin monitoring and the transition between agents harder to interpret.
What this interaction means in plain words
Argatroban and Heparin 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.
Argatroban belongs to Cardiovascular; Heparin belongs to Cardiovascular.
Why it happens
Additive anticoagulation through indirect (antithrombin-mediated) and direct thrombin inhibition.
What to do
Avoid concurrent use, and stop heparin (including flushes and heparin-coated lines) when starting argatroban for HIT. Monitor aPTT and watch for bleeding during any switch.
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 Heparin
- Defibrotide + Heparin Contraindicated
- Heparin + Ketorolac Contraindicated
- Heparin + Oritavancin Contraindicated
- Acemetacin + Heparin Major
- Acetylsalicylic acid + Heparin Major
- Alteplase + Heparin Major
Other interactions of Argatroban
- Argatroban + Defibrotide Contraindicated
- Argatroban + Ketorolac Contraindicated
- Argatroban + Mifepristone Contraindicated
- Abciximab + Argatroban Major
- Acalabrutinib + Argatroban Major
- Acetylsalicylic acid + Argatroban Major
Frequently asked questions
Can I take Argatroban with Heparin?
MediHelp rates the interaction as major. Argatroban and Heparin 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. Both drugs inhibit coagulation, so giving them together raises the risk of serious bleeding. Argatroban also raises the aPTT and INR, which makes heparin monitoring and the transition between agents harder to interpret.
How serious is the interaction between Argatroban and Heparin?
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 concurrent use, and stop heparin (including flushes and heparin-coated lines) when starting argatroban for HIT. Monitor aPTT and watch for bleeding during any switch.
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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