Travelling With a GLP-1

My husband and I went to Europe for two weeks in May. It was the first trip since I started, and I want to write it up in more detail than it probably deserves, because this is the entry I would have wanted before I went and I could not find it anywhere.

Everything worth knowing here is logistics. None of it is difficult. All of it is the sort of thing that ruins a Tuesday if you have not thought about it.

Getting it there

Carry-on, always. The medication and the needles go in the cabin bag, and they stay with you. In the United States the TSA permits medication and the pens or syringes needed to administer it in carry-on baggage, along with ice packs and cooling cases, and these are not subject to the usual liquid limits. You declare them at the checkpoint and that is the end of it.

Checked baggage is a bad idea for two independent reasons. The hold can get cold enough to freeze a pen at altitude, and freezing destroys it. And checked bags get delayed, which turns a two-week holiday into a two-week gap in treatment.

Keep it in the original box. The pharmacy label is what makes the thing identify itself — to a security officer who has not seen one before, to a customs official, and to any clinician you might need abroad. I also carried a photograph of the prescription on my phone, which I did not need and would have been glad of.

Rules outside the US vary. I checked my airline and both destination countries before I left. It took ten minutes and I would do it again.

Keeping it cold, and the minibar incident

Storage is where I actually made a mistake.

The default for these products is refrigeration between 2°C and 8°C before first use. Every product also permits a limited stretch at room temperature — but the length of that stretch differs by product, and I am deliberately not going to quote you a number here, because the one that matters is the one on your own label. Check it. Do not rely on a figure you read on a forum, including this one.

What went wrong: our hotel in Lisbon had a minibar fridge that could not be emptied and ran, as far as I could tell, at approximately Arctic. I put the pen in there on arrival, went to dinner, and remembered somewhere over the dessert course that the failure mode I actually care about is not too warm. It is frozen. A frozen GLP-1 pen is a discarded GLP-1 pen, and mine cost more than the flight.

It was fine. It was fine because I went back and moved it to the door shelf and stuck a thermometer in there, and because I had brought a small insulated case with a gel pack, which is genuinely all you need and costs about twenty dollars.

The rules I now travel by:

• Never the freezer compartment, never against the back wall of a fridge.
• Never a hot car, never direct sun, never a windowsill.
• If in doubt about a hotel fridge, use the insulated case and a fresh gel pack.
• If a pen has frozen, it is finished. Do not use it because it looks fine.

The time-zone question I overcomplicated

I spent an embarrassing amount of thought on this before leaving.

The answer is: it does not matter very much. Semaglutide has a half-life of roughly a week. That is the entire reason it is a weekly injection. A shift of eight or nine hours in the timing of a single dose is not a clinically meaningful event for a drug operating on that timescale.

What does matter is not losing track of which day it is, which is easier to do than you would think on the far side of a long flight. My rule was simply to keep injecting on Sunday according to my home time zone and let the local clock do whatever it wanted.

I will admit that the reason I did not lose track is that Zenday App kept the schedule for me. The dose reminder sat there through the whole trip and did not care that I was jet-lagged, and I could see the interval since my last injection at a glance rather than counting backwards on my fingers in a hotel room. Missing doses is one of the quietest ways this treatment goes wrong — you do not feel it that week, you feel it as an unexplained stall three weeks later — and having something that simply does not let that happen has been worth more to me than any other single feature.

If you do miss one

Because people do, and the internet answer is a mess.

For once-weekly semaglutide, the label is specific: if you miss a dose and the next scheduled dose is more than two days away, take the missed dose as soon as you can. If the next scheduled dose is less than two days away, skip the missed one and resume your normal schedule. Do not double up to catch up. Doubling is how you turn a missed dose into a very unpleasant week.

If you miss more than two consecutive weekly doses, that is a conversation with your prescriber rather than a decision to make alone. Tolerance to these drugs fades, and you may need to restart lower and titrate back up rather than resuming at your previous dose. That is not a setback; it is the same reason you started low in the first place.

The one supplement decision that travelling made for me

I packed one tub and left two behind.

At home I take creatine and electrolytes; abroad, in a suitcase with a weight limit, Minome’s GLP-1 Foundation being one scoop rather than two products is not a marginal convenience, it is the difference between the routine surviving a fortnight and quietly collapsing on day three. It is unflavoured, which mattered more than I expected in a month when I had gone off almost everything sweet, and it dissolves in whatever water is available.

That is a genuinely small point and I am making it anyway, because the thing that breaks a supplement routine is almost never a considered decision to stop. It is a fortnight of disruption and a tub that stayed at home.

It did not solve the fortnight’s actual problem, which was protein. Two weeks of hotel breakfasts and restaurant dinners put my seven-day average somewhere in the eighties, and no scoop of anything fixes that. I came back and spent a week deliberately over-correcting.

Eating abroad, briefly

Two small observations.

Portions in most of Western Europe suited me considerably better than portions at home, which was a slightly uncomfortable thing to notice about my own country.

And the protein problem gets harder when you are not cooking. A fortnight of bread, pastry, and small plates is delightful and is not 120 grams of protein a day. I did not solve this elegantly — I ate a lot of eggs at breakfast, ordered fish more often than I otherwise would have, and accepted that a two-week trip is not the place to run a perfect protocol.

I came home 1.2% lighter than I left, which given the circumstances I am counting as a success.

Where things stand

Down 16.4% at seven months. Still 1.7 mg, still holding, still three lifting sessions a week, which I did keep up abroad in two hotel gyms of wildly different quality.

The trip is the thing I was most nervous about before I started this treatment, and it turned out to be an insulated bag and one rule about the freezer. That is the whole entry, really: most of what sounds daunting about living on this drug is logistics, and logistics can simply be solved.

I turned the logistics of this month into a proper guide afterwards, without the anecdotes: how to travel with a GLP-1 — security, the cold chain, time zones, and the hotel fridge mistake I made here.