Inhaler
Inhalers are allowed in carry-on and are exempt from the standard liquids limit as a medically necessary item.
Carry-on
Allowed
Checked
Allowed
Carry-on details
Allowed. A metered-dose inhaler is a medically necessary item, so it's exempt from the standard 3.4 oz liquids rule and doesn't need to go in your quart-size bag. Declare it to the TSA officer at the checkpoint for separate screening, and keep it in your carry-on rather than checked baggage so you have it on hand and it isn't exposed to cargo-hold temperature swings.
Checked-bag details
Allowed, but not recommended. Pressurized canisters can be affected by temperature and pressure changes in the cargo hold, and a checked bag can be delayed or lost, so carrying your inhaler with you is the safer choice.
Special instructions
You're permitted to use your rescue inhaler during the flight if you need it. Keeping it in its original labeled packaging can speed up screening but isn't required.
Related rules
FAQ
- Does my inhaler count as a liquid under the 3-1-1 rule?
- No. Inhalers are treated as a medically necessary item and are exempt from the 3.4 oz liquids limit, though you should declare it to the TSA officer.
- Should I pack my inhaler in checked luggage?
- It's allowed, but not recommended. Keep it in your carry-on so it's accessible during the flight and isn't exposed to cargo-hold temperature changes or the risk of a lost bag.
Related items
Source: TSA — What Can I Bring? · Last verified: 2026-07-31
Final decision rests with the security officer at the checkpoint.