The Federal Aviation Administration has introduced MedGuide, an online reference that helps US pilots and air traffic controllers check medication-related fitness-for-duty requirements. The searchable tool covers prescription and over-the-counter medicines, providing guidance on permitted use, dosing frequency and waiting periods before users may resume flying or other safety-related duties.
Developed by the FAA’s Office of Aerospace Medicine, MedGuide supports airman medical certification and air traffic controller clearance decisions. Users can search by generic or brand name and identify the underlying condition being treated, which may affect the required observation period.
Version 1.0 lists medicines categorised by the FAA as allowed. The agency plans to add conditionally acceptable and unacceptable medications in later versions, so the absence of a drug from the initial release does not establish whether its use is permitted.
Starting a new medication generally requires a 48-hour observation period before returning to safety-related duties, although the period can be shorter or longer depending on the drug. Separate waits may apply after subsequent doses or discontinuation to account for delayed side effects, rebound symptoms, withdrawal or the stability of the underlying condition.
An allowed medication does not by itself establish fitness for duty. Users must also consider the medical condition and possible side effects, while MedGuide remains a reference tool rather than a substitute for medical advice or an individual aeromedical assessment.