Independent. Not affiliated with Eli Lilly or Novo Nordisk.Not medical advice. Your prescriber decides your treatment.
GLP-1 Field GuidePractical help, sourced from the label

Traveling and flying with GLP-1 pens

Your weekly injection does not have to stop you traveling. Here is what TSA allows at airport security, how long each medicine can stay out of the fridge, and how to handle time zones and trips abroad.

Compiled by the GLP-1 Field Guide editorUpdated 6 min readSourced from official labels. Not yet clinically reviewed.
Key points
  • Pack pens in your carry-on, not checked luggage.
  • Declare pens and any needles or syringes at the TSA checkpoint.
  • Medically necessary ice packs are allowed even if melted. Never let a pen freeze.
  • Know your room temperature allowance: 21 days (Zepbound and Mounjaro single-dose pens), 28 days (Wegovy single-dose pen), 56 days after first use (Ozempic).
  • Going abroad: original packaging, a copy of your prescription and a letter from your prescriber.

Packing your pens

Keep your medicine in your carry-on bag. The CDC advises carrying medicines onto the plane rather than checking them, to reduce the risk of loss, damage or theft.[4] It also keeps your pens out of the aircraft hold and away from baggage areas where the temperature is out of your control.

  • Keep pens in their original carton. The labels ask for this to protect them from light.[7, 8]
  • If you use a KwikPen, Ozempic pen or vials, pack enough new needles or syringes for the trip, plus a few spares.
  • Bring something to hold used needles until you can dispose of them properly, such as a small travel sharps container.

Airport security (TSA)

  • Pens and needles are allowed. TSA says unused syringes are allowed when accompanied by injectable medication, and you must declare them to security officers at the checkpoint for inspection.[1]
  • The 3.4 ounce liquid limit does not apply. You may bring medically necessary liquids and medications over 3.4 ounces (100 milliliters) in your carry-on. Take them out of your bag for screening.[2]
  • Labels help. TSA recommends, but does not require, that medication is labeled to make screening easier.[1] The pharmacy label on the carton does the job.
  • Ice packs. Medically necessary gel ice packs in reasonable quantities are allowed even when they are melted or slushy. Tell the officer.[3]

Keeping pens at the right temperature

Every one of these medicines can spend some time out of the fridge, which makes most trips simple. The limits come from the official labels:

Medicine and deviceAllowed out of the fridge
Zepbound or Mounjaro single-dose penUp to 86°F (30°C), 21 days in total
Zepbound KwikPenUp to 86°F after first use; throw away 30 days after first use
Wegovy single-dose pen46°F to 86°F, in the carton, up to 28 days
Ozempic pen (after first use)59°F to 86°F or in the fridge, for 56 days

From the Zepbound Instructions for Use, the Mounjaro prescribing information, the Wegovy pen guide and the Ozempic prescribing information.[5, 6, 10, 7, 8] Full details, including Mounjaro KwikPens and Wegovy FlexTouch, are in theLilly storage guide and the Novo Nordisk storage guide.

The two things that ruin a pen on a trip are heat and freezing:

  • Heat: 86°F (30°C) is the ceiling for all of them. A parked car, a sunny beach bag or a hotel windowsill can go well past it.
  • Freezing: never use a pen that has frozen.[5, 7] If you use an ice pack, wrap it so it does not sit directly against the pen.
  • Hotel fridges: some run cold enough to freeze items at the back. Keep the pen near the front, or rely on the room temperature allowance instead.

Time zones and your injection day

These are once-weekly medicines, so a few hours either way from a time zone change is not what the labels are concerned with. The simplest approach for most trips is to keep your usual injection day.

If you need to move your injection day, each label sets a minimum gap between two doses:

  • Zepbound and Mounjaro: the day can be changed if needed, as long as there are at least 3 days (72 hours) between two doses.[9, 10]
  • Ozempic: the day can be changed if needed, as long as there are at least 2 days (more than 48 hours) between two doses.[8]
  • Wegovy: ask your prescriber or pharmacist before moving your day.

If a trip means you miss a dose altogether, the labels give each medicine its own window:

  • Zepbound and Mounjaro: take it as soon as possible within 4 days (96 hours) of the missed dose.[9, 10]
  • Ozempic: take it as soon as possible within 5 days of the missed dose.[8]
  • Wegovy injection: if your next dose is more than 2 days away, take it as soon as possible. If it is less than 2 days away, skip it and take the next one on your usual day.[11]

Outside those windows, or if you have missed more than one dose, check your leaflet and talk to your prescriber before restarting.

Traveling abroad

The CDC's advice for traveling internationally with medicines includes:[4]

  • Keep medicines in their original, labeled containers.
  • Carry copies of your prescriptions.
  • Get a letter from your healthcare provider listing each medicine, its generic name, the dose and why you take it.
  • Check the rules of your destination, and of any country you pass through on a layover, with that country's embassy before you go.

The generic names are tirzepatide (Zepbound, Mounjaro) and semaglutide (Wegovy, Ozempic). Brand names differ in some countries, so the generic name on your letter helps officials and pharmacists.

Travel checklist

  1. Enough medicine for the trip

    Check how many doses the trip covers and whether a refill falls while you are away.

  2. Needles or syringes, if your device needs them

    Plus a way to store used ones safely.

  3. Original cartons with pharmacy labels

    They protect the pens from light and make screening easier.

  4. Prescription copy and prescriber letter

    Essential abroad, useful anywhere.

  5. Your room temperature allowance

    Know how many days you have, and note on the carton when a pen leaves the fridge.

  6. Your injection day plan

    Decide before you go whether you are keeping your day or moving it.

The injection logbook saves on your phone, so your site rotation history comes with you.

Common questions

Can I take Zepbound, Mounjaro, Wegovy or Ozempic pens on a plane?

Yes. TSA allows unused syringes when they are accompanied by injectable medication, and you must declare them to the officers at the checkpoint. TSA also allows medically necessary liquids over 3.4 ounces in your carry-on bag.

Should I pack GLP-1 pens in checked luggage?

The CDC advises carrying medicines onto the plane rather than checking them, to reduce the risk of loss, damage or theft. Carry-on also keeps them with you, where you can control the temperature.

Can I bring an ice pack through airport security for my medication?

TSA says medically necessary gel ice packs in reasonable quantities are allowed even if they are melted or slushy. Tell the officer at the checkpoint.

Do I need to keep my pen cold while traveling?

Not always. Each medicine has an allowance at room temperature: 21 days in total for Zepbound and Mounjaro single-dose pens, 28 days for the Wegovy single-dose pen, and 56 days after first use for Ozempic. Check the storage guides for your device, and never let a pen freeze.

What do I do about my injection day when I change time zones?

Many people simply keep their usual day. If the trip means moving your dose, the labels set a minimum gap between two doses: at least 3 days (72 hours) for Zepbound and Mounjaro, and at least 2 days (48 hours) for Ozempic. Ask your prescriber if you are unsure.

Not medical adviceThis guide explains what the official instructions say. Your prescriber and pharmacist know your situation, so ask them if anything here does not match what you were told.

Sources

  1. Transportation Security Administration. What can I bring? Unused syringes. Revised n/a (web page). Last checked 2026-09-23.
  2. Transportation Security Administration. I am traveling with medication, are there any requirements I should be aware of?. Revised n/a (web page). Last checked 2026-09-23.
  3. Transportation Security Administration. What can I bring? Gel ice packs. Revised n/a (web page). Last checked 2026-09-23.
  4. Centers for Disease Control and Prevention. Traveling with Prohibited or Restricted Medications (CDC Yellow Book). Revised Last reviewed April 23, 2025. Last checked 2026-09-23.
  5. Eli Lilly and Company. Zepbound single-dose pen Instructions for Use. Revised April 2026. Last checked 2026-09-23.
  6. Eli Lilly and Company. Zepbound KwikPen Instructions for Use. Revised January 2026. Last checked 2026-09-23.
  7. Novo Nordisk. How to use the Wegovy pen. Revised n/a (web page). Last checked 2026-09-23.
  8. Novo Nordisk. Ozempic (semaglutide) Prescribing Information, Medication Guide and Instructions for Use. Revised IFU 06/2026. Last checked 2026-09-23.
  9. Eli Lilly and Company. Zepbound (tirzepatide) Prescribing Information. Revised 08/2026. Last checked 2026-09-23.
  10. Eli Lilly and Company. Mounjaro (tirzepatide) Prescribing Information. Revised 08/2026. Last checked 2026-09-23.
  11. Novo Nordisk. Wegovy (semaglutide) Prescribing Information. Revised 06/2026. Last checked 2026-09-23.
How to store Zepbound and MounjaroThe 21 and 30-day rules, device by device.How to store Wegovy and OzempicThe 28 and 56-day rules, plus Wegovy pills.Injection site logbookSaved on your phone, so your rotation history travels with you.