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Does Nabumetone Interact with Methotrexate?

CDI records a major classification for Nabumetone and Methotrexate. The stored summary is: NSAIDs may competitively inhibit methotrexate accumulation and enhance its toxicity. Caution should be used when administering nabumetone concomitantly with methotrexate. The mechanism involves competitive inhibition of methotrexate accumulation. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This record was extracted from drug labeling through openFDA. NIH/NLM RxNorm is used for drug identities. The summary and severity classification are CDI's processed information, not a verbatim source quotation. Product, route, and patient circumstances matter.

Severity
Major
Nabumetone Class
Nonsteroidal Anti-inflammatory Drug
Methotrexate Class
Folate Analog Metabolic Inhibitor
Management
Close medical supervision required
Data Source
U.S. FDA via OpenFDA

Recorded Mechanism

competitive inhibition of methotrexate accumulation

What To Tell Your Doctor or Pharmacist

If you are taking Nabumetone and your doctor is considering prescribing Methotrexate (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Ask how frequently you should be monitored while these are co-prescribed
  • Ask whether any dosage adjustments are needed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Nabumetone(Relafen)+💊 Methotrexate(Otrexup)

Severity & Interaction Details

⚠️
major
Use with caution — major interaction
Serious risk of clinically significant harm. Generally avoid; if used, monitor closely.
Severity scale
MinorContra
On record
Yes
Drug A class
Nonsteroidal Anti-inflammatory Drug
Drug B class
Folate Analog Metabolic Inhibitor
Source
NLP:nabumetone

What this means in plain English

NSAIDs may competitively inhibit methotrexate accumulation and enhance its toxicity. Caution should be used when administering nabumetone concomitantly with methotrexate.

About Nabumetone and Methotrexate

Nabumetone is a Nonsteroidal Anti-inflammatory Drug, while Methotrexate is a Folate Analog Metabolic Inhibitor. You may recognize them by the brand names Relafen and Otrexup. Both Nabumetone and Methotrexate carry an FDA boxed warning — the agency's most serious safety designation.

Source and Limitations

This record was produced by automated extraction from drug-label information, including AI processing. The summary and mechanism are not verbatim FDA quotations. The drug profiles below may describe different formulations from the source label. Confirm the exact product and route with your pharmacist. This page does not establish independent clinical review.

📖 Source: NLP:nabumetone

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How this information is prepared: CDI uses automated extraction, including AI, to summarize drug labeling from openFDA and includes separately identified curated-reference records. RxNorm helps identify medications; it does not verify interaction claims. Extracted summaries and CDI severity classifications can contain errors and are not verbatim FDA statements or independent clinical review. Maintained by CheckDrugInteractions.com. See our methodology or report a correction at support@checkdruginteractions.com.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine, supplemented with a small number of well-established interactions from curated clinical references. For informational purposes only. Always consult your pharmacist or physician.

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