An emergency backup kit
The stash of insulin, hypo treatment and kit that stops a lost pump or a stranded train becoming a crisis.
An emergency backup kit is the stash of insulin, hypo treatment and kit you keep so that a lost pump, a dead sensor, a spilled pen or a stranded train doesn’t become a crisis. The point is that you’re never more than an arm’s reach from being able to treat a low and take insulin, whatever fails.
- Keep fast-acting sugar (glucose that raises your blood sugar quickly, like tablets or a small juice) on you at all times, because a low can happen anywhere and won’t wait.
- Carry a spare way to take insulin: a backup pen or syringes even if you pump, because pumps and pens both fail.
- Have a way to test glucose without your usual tech: a finger-prick meter and strips, because sensors die and lag.
- Keep spares at home, in a bag and somewhere else, so one lost bag isn’t everything.
- Check the kit every so often, because sugar gets eaten and insulin and strips expire.
What actually goes in it
Think in terms of what each failure would leave you unable to do, then pack the thing that fixes it. If your pump fails, you need another way to get insulin in: a spare rapid-acting pen or syringes, and if you’re on a pump, a supply of long-acting insulin too, because a pump has no separate background dose to fall back on. If your sensor dies, you need a finger-prick meter, strips and a lancet. If you go low, you need fast-acting sugar and something longer to follow it.
Round it out with the boring things that ruin a day when they’re missing: spare pump supplies or pen needles, batteries or a charger, alcohol wipes, and a note of your insulin names and doses somewhere findable. Ketone strips matter too, especially on a pump, because a blocked line can push you towards ketones fast.
How a kit gap moves your glucose, both ways
A backup kit isn’t neutral: the whole reason it exists is that a gap moves glucose in both directions, and often faster than you’d expect. Lose your insulin and you drift high, and on a pump that can tip into ketones within hours because there’s no long-acting insulin holding the background. Lose your sugar when you’re dropping and a low keeps falling until you find something to treat it with.
The kit doesn’t change your glucose by itself. What it changes is your options when something breaks. Being able to finger-prick when a sensor reads “no data”, or inject when a pump alarms, is the difference between a reading you can act on and an hour of guessing. That’s why the meter and the spare pen earn their place even when you never touch them for months.
Why it lives in more than one place
One perfectly packed bag is one bag you can leave on a train. The kit works because it’s spread out: a small always-on-you set (sugar, meter, a way to inject), a fuller bag you carry day to day, and a home stash you top the others up from. That way a single loss is annoying rather than dangerous.
Coming back to this after years of winging it is normal, not a step backwards. Plenty of people go a long time carrying nothing and only build a kit after one bad afternoon. Starting now counts. You don’t need it perfect or complete on day one; a meter, strips, sugar and a spare pen already covers the failures most likely to catch you out.
What changes what you need
There’s no single correct kit. If you pump, you carry more, because you’re covering both the rapid insulin and the long-acting background a pump doesn’t give you separately. If you inject, your existing pens already are most of your backup. Someone who barely leaves a small town needs less redundancy than someone with a two-hour commute or a lot of travel. If your hypo warning signs have faded, sugar and a meter on you matter more, not less. Heat degrades insulin, so a hot car boot is not storage.
When the kit earns its place
Examples, not instructions or doses.
Your pump throws an occlusion alarm mid-morning and won’t deliver. Because you’ve a spare pen in your bag, you can take insulin while you sort the pump out, instead of drifting up and towards ketones for the rest of the day.
Your CGM shows 'no data' and you feel off but can’t tell which way. A finger-prick meter in the same bag turns a guess into a number, so you know whether you’re treating a low or leaving it alone.
You’re out, you feel a low coming, and your usual sugar is at home. This is exactly the moment fast-acting glucose on you (not in the other bag) is meant for: something to treat the low now, before it drops further.
Worth paying attention to
Questions that make an appointment useful
When it's urgent
If you’re on a pump and it stops delivering, and you can’t take insulin another way, you can move towards DKA (diabetic ketoacidosis) within hours: high glucose, ketones, feeling sick, vomiting, deep or fast breathing, tummy pain. Take insulin by pen or syringe if you can, check ketones, and contact your diabetes team urgently. If you’re vomiting, can’t keep fluids down, or feel very unwell, call NHS 111, or 999 if you’re struggling to breathe or too drowsy to treat yourself. If you run out of insulin entirely and can’t reach your team or a pharmacy, the NHS 111 emergency prescription service can help.