Cough Syrup
Cough syrup is exempt from the standard 3.4 oz liquids limit in carry-on if you declare it at the checkpoint.
Carry-on
Allowed with conditions
Checked
Allowed
Carry-on details
Allowed with conditions. Cough syrup, whether prescription or over-the-counter, is treated as a medically necessary liquid and is exempt from the 3.4 oz (100 ml) / quart-bag limit — you can bring more than that in reasonable quantities for your trip. The condition: you must take it out and declare it to a TSA officer at the start of screening, separate from your regular liquids bag. Officers may test it with liquid-screening equipment or swab the container.
Checked-bag details
Allowed without a volume restriction in checked baggage.
Special instructions
Keep the syrup in its original labeled bottle if possible, and pack it in carry-on rather than checked in case you need it during the flight.
Related rules
FAQ
- Do I need to declare cough syrup at airport security?
- Yes. Even though it's exempt from the 3.4 oz limit, you need to tell the TSA officer you're carrying it so it can be screened separately.
- Is there a maximum amount of cough syrup I can bring?
- There's no hard number — TSA allows a reasonable quantity for your trip. An unusually large amount may prompt more questions from the officer.
Related items
Source: TSA — What Can I Bring? · Last verified: 2026-07-30
Final decision rests with the security officer at the checkpoint.