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Conditionally acceptable biologics: interleukin and TSLP inhibitors

Interleukin and TSLP inhibitors, biologic
Other names: dupilumab, Dupixent, mepolizumab, Nucala, benralizumab, Fasenra

FAA guidance

Depends on the underlying condition.

Wait

2 weeks

ground trial when starting

Different waits apply in other cases.

FAA label

CONDITIONALLY ACCEPTABLE

Source: FAA, Biologics, Biosimilars, and Non-Biologics. FAA date 26 August 2026. Checked by Crosscheck 14 October 2026

The FAA lists dupilumab, mepolizumab, benralizumab, reslizumab, tezepelumab and related biologics as conditionally acceptable, depending on the underlying condition, with a two-week ground trial when starting and four hours of no-fly after each dose.

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Compare FAA documents: Conditionally acceptable biologics: interleukin and TSLP inhibitorsWhat each of the two FAA documents says, in plain wordsOpen

Wait

  • 4 hours no-fly after each dose
  • a forty-eight hour ground trial when changing from one biologic or biosimilar to another for the same indication

Changing from one biologic or biosimilar to another for the same indication requires a 48-hour ground trial.

The FAA's CACI – Asthma Worksheet says monoclonal antibodies are not acceptable for CACI; it does not name these medicines.

  • 14 days after starting: ground observation
  • 4 hours after each dose: no flying
Show the FAA's words: Conditionally acceptable biologics: interleukin and TSLP inhibitorsThe official FAA wording: three passages, each with its document and dateOpen
FAA, Biologics, Biosimilars, and Non-Biologics · FAA date 26 August 2026
Initial observation: All require a 2-week no-fly/ground trial to verify no side effects.
CONDITIONALLY ACCEPTABLE BIOLOGIC MEDICATIONS Monotherapy — Dependent on underlying condition(s), see those pages.
Interleukin Inhibitors: benralizumab (Fasenra), brodalumam (Siliq), canakinumab (Ilaris), dupilumab (Dupixent), mepolizumab (Nucala), reslizumab (Cinqair), rilonacept (Arcalyst), 4 hours. TSLP (thymic stromal lymphopoietin) Inhibitor: tezepelumab (Tezspire), 4 hours
FAA, Biologics, Biosimilars, and Non-Biologics · FAA date 26 August 2026
Changing from one biologic/biosimilar to another for the same indication requires a forty-eight (48) hour ground trial to mitigate any aeromedical risk.
FAA, CACI – Asthma Worksheet · FAA date 24 September 2025
Acceptable Medications
NOT acceptable for CACI:
Monoclonal antibodies
Sources and dates: Conditionally acceptable biologics: interleukin and TSLP inhibitorsTwo FAA documents, with the FAA's date and when Crosscheck checked themOpen

See also

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.