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What to Actually Put in a Travel First-Aid Kit (and What's a Waste of Space)

A travel first-aid kit is mostly dead weight unless you build it right. The rehydration salts you'll bless, the real blister kit, and the meds that are illegal where you're going.

Let me tell you what’s actually in a good travel first-aid kit, because the ones they sell in shiny zip cases are about 70% theatre. I’ve bought those kits. They come with a triangular bandage (for a broken arm you will not be splinting in a hostel) and forty plasters the exact wrong size and a foil “emergency blanket” that I have, across years of travel, used precisely never. Meanwhile the three things that have genuinely saved my trips weren’t in any of them.

So here’s the honest list. The travel first-aid kit essentials that earn their weight, and the dead cargo you can leave at home.

If I could only pack one thing it’s oral rehydration salts. ORS. Those little sachets you stir into water.

Because the thing that actually flattens you abroad isn’t some exotic disease. It’s a bad meal, or the heat, or both, and the ensuing 24 hours of your body emptying itself from every available exit. And what knocks you truly flat in that situation isn’t the bug — it’s the dehydration on top. I’ve had a dodgy plate of something in a town whose name I won’t drag through the mud, and the difference between a miserable day and a genuinely scary one was a couple of those sachets. They taste like sad salty Lucozade. Drink them anyway. You’ll feel the lights come back on within the hour, almost.

Two quid for ten sachets, weigh nothing. Buy a box. This is the single best ratio of “tiny and cheap” to “absolute lifesaver” in the whole bag.

The other thing that wrecks trips isn’t dramatic at all. It’s your feet. And ordinary plasters are useless on a blister — they slide off within an hour of walking, soaked and curled and gone.

What you want is the hydrocolloid blister plasters. The gel ones (Compeed is the famous brand, but the cheap supermarket versions work nearly as well). They stick like they mean it, they cushion the raw bit, and they stay on for days, through showers, through walking. Pack a strip of the heel ones and a strip of the small toe ones. Throw in some surgical tape too — wrap a hotspot before it becomes a blister and you’ve won.

Now the part nobody tells you, and it matters. Some medicines that are utterly normal at home are illegal in other countries, and people get genuinely detained for it.

The classic trap is anything with codeine, and certain cold-and-flu tablets, and some sleeping pills — these are restricted or flat banned in places, the Gulf states being the famous example, but it’s a longer list than you’d think and Japan has its own surprising rules. The fix is simple and free. Before you go, check your destination’s customs page for your specific meds. Keep everything in its original box with the label. Carry a copy of the prescription for anything serious. And don’t — please — decant your pills into one of those clever little day-of-the-week organisers for a border crossing, because unlabelled loose pills are how an awkward chat becomes a very bad afternoon.

For the everyday stuff, here’s what actually earns its place. Painkillers (ibuprofen and paracetamol both — they do different jobs and you can stack them). An antihistamine, for stings and surprise allergies and as a backup sleep aid on night buses. Something for diarrhoea like loperamide, for the “I have a 9-hour journey and cannot stop every twenty minutes” emergency — not for actual illness, just for when you’re trapped. Antiseptic wipes. A few of those hydrocolloid plasters. Rehydration salts. Done.

Right, the cuts. Out goes the bulky boxed kit and most of its contents. You do not need: the triangular bandage (a scarf works, and you won’t need it), the giant gauze pads (a clinic will have these and so will any pharmacy), the foil blanket, the cardboard finger-splint, the eyewash bottle, the dozen sizes of plaster you’ll never match to a wound. You also don’t need a thermometer, honestly — if you’re hot enough to wonder, you know.

The trick is remembering that you are almost never far from a pharmacy. Pharmacies exist nearly everywhere, they’re often cheaper than home, and the pharmacist can frequently sort you out faster than a doctor for the small stuff. So your kit only needs to cover the gap — the night, the bus, the trek, the island — between the problem starting and you reaching one. That’s a small bag. A sandwich-sized pouch, genuinely.

Build it around that idea and your first-aid kit stops being a heavy box of guilt you never open and becomes four or five things you actually reach for. The salts. The blister plasters. The painkillers. The anti-runs tablets. And the quiet confidence that the boring, illegal-somewhere meds are sorted before you fly.

Pack the sachets, tape your feet, check the customs page — and bin the foil blanket, you were never going to use it.

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