The FAA has launched a searchable online tool that tells US pilots and air traffic controllers which medications they may take and how long they must wait before returning to safety-related duties. The agency disclosed the initial version covers only drugs it categorises as allowed.

The tool, called MedGuide, spans prescription and over-the-counter medicines. It lists waiting periods for both a first dose and subsequent doses, which can differ.

The National Business Aviation Association (NBAA) publicised the resource on October 15, 2026. It said the guide gives pilots a clearer way to understand medication restrictions.

"This tool, while still a work in progress, equips aviators to make safe, fit-for-flight decisions about medication use," said Mark Larsen, NBAA's director of safety and flight operations.

What does the tool actually cover?

The first release has a deliberate limit. It contains only medications the FAA classes as allowed, and the agency plans to add conditionally acceptable and unacceptable drugs in future updates.

That gap matters operationally. A drug's absence from MedGuide does not determine whether a pilot can use it while flying, so the current version cannot serve as a complete go/no-go reference. NBAA said it will keep pressing for clearer guidance and practical timelines as the FAA expands the database.

The FAA's baseline rule is unchanged. Starting a new medication generally requires a 48-hour observation period before a return to safety-related duties. Drug-specific guidance may lengthen or shorten that wait, and the underlying condition may require additional time to demonstrate stability.

Does an allowed medication mean fit for duty?

No. The FAA states that an allowed medication does not, by itself, make a pilot or controller fit for duty. Users must weigh their medical condition and any side effects.

The agency positions MedGuide as a reference, not a substitute for an individual medical assessment (the case-by-case evaluation performed by an aviation medical examiner) or advice from a doctor.

Why the FAA built it

The tool answers an information gap identified by the FAA's Mental Health and Aviation Medical Clearances Aviation Rulemaking Committee (ARC, an industry-agency panel that recommends regulatory changes) in its 2024 report.

Before the guide, uncertainty about medication rules left pilots unsure of their standing before applying for a medical certificate or returning to the cockpit. Larsen said the tool offers a simpler route through restrictions that vary between first and later doses.

What does this change for operators?

For flight departments and air traffic facilities, MedGuide reduces the ambiguity around common medications and shortens the path to a documented return-to-duty decision. The practical limit remains scope: until the FAA publishes the conditionally acceptable and unacceptable categories, operators still need case-by-case medical review for anything not listed.

The FAA has not set publication dates for the expanded categories. NBAA's engagement suggests business aviation will track those updates closely as the next test of the tool's usefulness.