Venlafaxine and Aspirin Interaction
Drug interaction information between Venlafaxine and Aspirin.
Venlafaxine and Aspirin have a documented moderate interaction in FDA labeling.
FDA drug labeling documents a moderate-severity interaction between Venlafaxine and Aspirin. Major interactions are generally avoided, moderate ones may need monitoring or a dose adjustment, and minor ones are usually low-risk. This page shows the documented mechanism and guidance. Label-documented interactions are not a complete safety review, so always confirm your own medications with a pharmacist or doctor. Educational information, not medical advice.
How They Interact
Both drugs interfere with how blood cells called platelets work, which increases the risk of serious bleeding in the stomach or other areas.
What To Do
Watch for signs of unusual bruising or bleeding and talk to your doctor about the risks of this combination.
FDA Label Information
Drugs that Interfere with Hemostasis (e.g., NSAIDs, Aspirin, and Warfarin) Serotonin release by platelets plays an important role in hemostasis. Epidemiological studies of the case-control and cohort design that have demonstrated an association between use of psychotropic drugs that interfere with serotonin reuptake and the occurrence of upper gastrointestinal bleeding have also shown that concurrent use of an NSAID or aspirin may potentiate this risk of bleeding.
Venlafaxine Also Interacts With
- Phenelzine moderate
- Metoprolol minor
- Fluoxetine minor
- Alprazolam minor
- Warfarin minor
Aspirin Also Interacts With
- Atenolol major
- Fluoxetine major
- Ibandronate major
- Alendronate moderate
- Apixaban moderate
Frequently Asked Questions
Can I take Venlafaxine and Aspirin together?
This is a moderate interaction. Watch for signs of unusual bruising or bleeding and talk to your doctor about the risks of this combination.
How serious is the interaction between Venlafaxine and Aspirin?
This interaction is classified as "moderate" severity by the FDA. Moderate interactions may worsen your condition or change how your medications work.
Why do Venlafaxine and Aspirin interact?
Both drugs interfere with how blood cells called platelets work, which increases the risk of serious bleeding in the stomach or other areas.
Understanding the Venlafaxine and Aspirin Interaction
FDA-approved prescribing information for these two drugs flags their combination as a moderate-severity interaction. Venlafaxine belongs to the Serotonin-Norepinephrine Reuptake Inhibitor (SNRI) class and Aspirin belongs to the Antiplatelet / NSAID class - two categories that can collide when co-prescribed. The mechanism described in FDA labeling is: Both drugs interfere with how blood cells called platelets work, which increases the risk of serious bleeding in the stomach or other areas. Severity tiers matter: major flags generally advise avoidance, moderate flags often require monitoring or dose adjustment, and minor flags may only call for awareness.
Context around a specific patient determines real-world impact. Venlafaxine has 22 total documented interactions on file in this dataset, and Aspirin has 47. Each additional medication compounds the interaction surface, which is why pharmacists run full-profile checks rather than evaluating one pair at a time. FDA-derived guidance for this pair is: Watch for signs of unusual bruising or bleeding and talk to your doctor about the risks of this combination. Timing of doses, renal and hepatic function, age, and other concurrent prescriptions all shape whether a labeled interaction matters clinically.
An interaction flag is not a verdict. A large share of labeled interactions are managed routinely in clinical practice, the fix may be as simple as spacing doses or adding a monitoring test. Others require the prescriber to choose a different medication entirely. This page surfaces FDA-sourced labeling and openFDA data for educational purposes only; it is not medical advice and cannot account for your full clinical picture. Never start, stop, or adjust either Venlafaxine or Aspirin based on a web page, speak with your prescriber or pharmacist before making any change.
Sources: FDA Drug Labels (SPL) via openFDA (2026). This is for informational purposes only and is not medical advice. Always consult your healthcare provider about drug interactions.
Read our methodology - how this data is sourced, computed, and verified.