Can You Take Naproxen with Aspirin?
A plain-English look at the moderate interaction between Naproxen (Pediapharm Naproxen Suspension 25 mg/mL (Medexus Pharma, Canada)) and Aspirin (Spren 100) — what it means, why it happens, and what to talk to your doctor or pharmacist about.
Combining Naproxen (Pediapharm Naproxen Suspension 25 mg/mL (Medexus Pharma, Canada)) with Aspirin (Spren 100) is a moderate interaction requiring caution and monitoring. No additional analgesic benefit from combining NSAIDs. Additive GI, renal, and cardiovascular toxicity.
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Key Takeaways
- Interaction severity: Moderate
- Risk: GI bleeding, renal impairment, cardiovascular events.
- Mechanism: No additional analgesic benefit from combining NSAIDs. Additive GI, renal, and cardiovascular toxicity.
- Naproxen: S4 in Australia, low risk
- Aspirin: S2 in Australia, low risk
- Claims action: Monitor and document. Request clinical justification if combination is ongoing.
Naproxen vs Aspirin at a Glance
| Property | Naproxen | Aspirin |
|---|---|---|
| Brand names | Pediapharm Naproxen Suspension 25 mg/mL (Medexus Pharma, Canada), Proxen SR 750, Naprosyn SR750 | Spren 100, Cardiprin 100, Pharmacy Action Low Dose Aspirin |
| Drug class | nsaid | nsaid |
| Risk level | low | low |
| TGA Schedule (AU) | S4 | S2 |
Why Is This Combination Dangerous?
No additional analgesic benefit from combining NSAIDs. Additive GI, renal, and cardiovascular toxicity.
Regulatory Guidance by Jurisdiction
Australia TGA / SIRA / WorkSafe
The TGA and Australian Medicines Handbook classify this as a moderate drug interaction requiring monitoring and clinical review.
The TGA advises caution with concurrent NSAID use due to increased GI and cardiovascular risk. PBS restrictions may apply to concurrent prescribing.
United Kingdom NICE / MHRA / FPM
NICE NG59 (Low Back Pain) recommends short-course NSAIDs only. Concurrent NSAID use or NSAID plus anticoagulant combinations should be flagged for GI bleeding risk assessment.
United States FDA / CDC / State WC
The CDC and FDA recommend monitoring concurrent CNS depressant use. State workers compensation formularies may restrict or require prior authorization for this combination.
What Claims Professionals Should Do
- Document the combination in the claim file with a note on interaction risk
- Request clinical justification from the prescriber at the next review
- Monitor for adverse effects including excessive sedation, falls, and cognitive impairment
- Assess injury relatedness of both medications to the compensable condition
- Review at next claim assessment and consider whether the combination is still clinically appropriate
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Related Resources
Important: This page is general health information, not personal medical advice. If you have questions about your medication — including starting it, stopping it, changing the dose, or combining it with something else — speak with your doctor or pharmacist. For an emergency or suspected overdose, call your local emergency number or poison information service immediately. Information is drawn from regulator and clinical guideline sources (TGA, FDA, MHRA, NICE, PBS, CDC); see our methodology for details.