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Heart

Warfarin and your FAA medical

Anticoagulant
Other names: Jantoven, Coumadin

FAA guidance

Depends on the underlying condition.

Wait

6 weeks

observation when starting, with 6 INR results

Source: FAA, Anticoagulants. FAA date 27 March 2024. Checked by Crosscheck 11 November 2026

The FAA sets a minimum observation time of six weeks and six INRs, no more than one a week, when warfarin is started, and the applicant must also meet any required observation time for the underlying condition.

Track your medications
More detail: warfarinThe rest of Crosscheck's reading, in plain wordsOpen

For established use, it says the treating physician's status report should include the dose history and schedule, a comment on side effects, and at least monthly INR results for the prior six months.

The FAA's anticoagulants page sends the certification decision to the heart disposition table, Item 36, and the protocol to the specific underlying condition.

  • 42 days after starting: ground observation
Show the FAA's words: warfarinThe official FAA wording: two passages, each with its document and dateOpen
FAA, Anticoagulants · FAA date 27 March 2024
For applicants who are just beginning warfarin (Jantoven) treatment the following is required: Minimum observation time of 6 weeks after initiation of warfarin therapy; Must also meet any required observation time for the underlying condition; AND 6 INRs, no more frequently than 1 per week
For applicants who are on an established use of warfarin (Jantoven), status report from the treating physician should address and include: Drug dose history and schedule; Comment regarding side effects; AND A minimum of monthly International Normalized Ratio (INRs) results for the immediate prior 6 months.
FAA, Anticoagulants · FAA date 27 March 2024
Aeromedical Decision Considerations:
See Item 36, Heart , Aerospace Medical Disposition table
Protocol:
As per the specific underlying condition(s), see Disease Protocols .
Sources and dates: warfarinOne FAA document, with the FAA's date and when Crosscheck checked itOpen
  • Anticoagulants

    FAA date 27 March 2024 · Checked by Crosscheck 11 November 2026 · Web page

Questions pilots ask

Each answer is built from the FAA guidance on this page. Its sources and dates are in the page.

What does the FAA say about warfarin for pilots?

FAA guidance: Depends on the underlying condition. The FAA sets a minimum observation time of six weeks and six INRs, no more than one a week, when warfarin is started, and the applicant must also meet any required observation time for the underlying condition. For established use, it says the treating physician's status report should include the dose history and schedule, a comment on side effects, and at least monthly INR results for the prior six months. Crosscheck does not predict the FAA's decision.

How long is the FAA's wait for warfarin?

6-week observation when starting, with 6 INR results.

Related pages

Medication guidance alone does not determine whether a pilot is medically qualified to fly. The underlying condition, dosage, side effects, medication combinations, and certification history may affect FAA eligibility.

For informational purposes only. Not legal or medical advice.