Is it safe to take naproxen (Aleve) with methotrexate?
Often, the combination is avoided or used only with close monitoring. Naproxen (an NSAID) can affect kidney function and may increase methotrexate levels, raising the risk of methotrexate side effects (such as low blood counts and mouth sores), especially at higher methotrexate doses or in people with kidney problems.
Whether it’s “allowed” depends heavily on your methotrexate dose (low weekly dose for arthritis vs higher doses used for cancer), your kidney function, and your overall risk factors.
What makes naproxen risky with methotrexate?
Naproxen can reduce how well the kidneys clear methotrexate. That can lead to higher methotrexate exposure in the body, which increases toxicity risk—particularly:
- Higher methotrexate doses
- Reduced kidney function
- Dehydration or other medications that also affect the kidneys
- Older age
- Treatment periods where methotrexate levels are meant to stay tightly controlled
Does the answer change if your methotrexate is for arthritis (low weekly dose)?
Yes. With low-dose methotrexate (commonly weekly for rheumatoid arthritis or similar conditions), clinicians sometimes allow NSAIDs, but it’s still not “automatically safe.” Many prescribers prefer to limit NSAID use and monitor closely, particularly around the time of methotrexate dosing and if any kidney issues exist.
If you’re taking naproxen around your methotrexate day, you should confirm with your prescriber or pharmacist for your specific regimen.
Are there symptoms that mean you should stop and get medical help?
Seek medical advice promptly (or urgent care depending on severity) if you develop signs that methotrexate toxicity may be occurring, such as:
- Unusual bruising or bleeding, severe fatigue, or infections (possible low blood counts)
- Mouth sores or sore throat
- Severe nausea/vomiting or diarrhea
- Shortness of breath or fever
- Sudden decrease in urination or swelling (possible kidney issues)
What should you do before taking them together?
Before combining naproxen and methotrexate, check:
- Your methotrexate dose (how many mg and whether it’s weekly)
- Your most recent kidney function labs (creatinine/eGFR) if you have them
- Whether you take other “kidney-affecting” medicines (your pharmacist can help review this)
- Timing: even if your clinician says it’s okay, spacing and monitoring matter
If you just need pain or fever control, ask your pharmacist what alternative is safer with your methotrexate.
Could there be a situation where it is commonly prescribed?
Yes—clinicians sometimes manage patients on methotrexate with an NSAID, but they do it case-by-case with attention to dose and kidney function. The safest move is to verify with your prescriber or pharmacist rather than relying on general guidance.
If you tell me your methotrexate dose (mg), how often you take it, and whether you have kidney disease, I can help you gauge the risk and what questions to ask your pharmacist.