Ordering prescriptions supplies
Set a reorder point with a comfortable buffer and you never run out of insulin under pressure. How to work yours out.
Running out of insulin is the thing to build your ordering around, so the trick is to reorder when you still have a comfortable buffer, not when you open the last box. Set your own “reorder point” and you never have to think about it under pressure.
- Put in your repeat prescription (the standing list your GP renews without a new appointment) when you have roughly two weeks of insulin left, not on your last pen.
- Order everything in one go: insulin, pen needles or pump kit, test strips, sensors, hypo treatment and ketone strips, so nothing gets forgotten.
- People with type 1 in England, Scotland, Wales and Northern Ireland get free prescriptions, so cost should never be the reason a supply lapses.
- If you have genuinely run out at a weekend or on holiday, NHS 111 can arrange an emergency supply of your usual insulin.
Why the buffer matters more than the routine
Insulin isn’t a thing you can safely skip while you wait for a delivery. There’s no home substitute, and going without it for even a day pushes glucose up and can start ketones building, which is how diabetic ketoacidosis begins. So the whole point of a reordering system is to make sure the gap between “I noticed I’m low” and “I have more” never overlaps with running dry.
That’s why the reorder point sits at about two weeks of stock, not at the last pen. Two weeks absorbs the ordinary friction: the GP takes a few days to approve the repeat, the pharmacy takes a day or two to dispense, a bank holiday lands in the middle, the item is briefly out of stock. None of those are emergencies if you’ve got a fortnight of slack. All of them are emergencies if you don’t.
Everything on the prescription, not just the insulin
Insulin is the one people remember, because it’s the one that frightens them. But a repeat prescription for type 1 usually carries a lot more, and it’s the quiet items that catch you out: pen needles, test strips, lancets, ketone test strips, and if you’re on a pump or a sensor, the consumables those need. Some of that comes on prescription and some (certain sensors, some pump supplies) comes through the clinic or a supplier instead, which varies by area and by the kit you’re on.
Worth doing once: sit down and list what you actually get through in a month of each thing. Then check every item is on your repeat and reorder them together. A system that reliably delivers insulin but leaves you rationing test strips has only half-solved the problem.
How ordering actually works, and where it stalls
Most people order through the NHS App, their GP’s online system, or by handing the repeat slip to the pharmacy. Nomination lets your chosen pharmacy pull the prescription electronically, which removes a step and a paper slip that can go missing. If your surgery still wants a few days to approve repeats, that approval time is exactly why you order early rather than late.
The common stalls are predictable: an item drops off your repeat after a review and you don’t notice until it’s not in the bag, a dose changes and the old quantity no longer lasts a month, or the pharmacy is out of your specific insulin and has to order it in. Checking the bag against your list when you collect catches the first two before they become a problem.
What changes how much slack you need
There’s no single right reorder point, because the delay you’re buffering against isn’t the same everywhere. A surgery that turns repeats around same-day and a pharmacy that always has your insulin in stock means you can run closer. A slow approval, an unusual insulin, or a holiday coming up means you want more slack. The honest rule is: order early enough that the longest normal delay you’ve actually experienced still leaves you with insulin in hand.
How this looks in practice
Examples, not instructions or doses.
You decide that when you open your second-to-last pen, that’s the signal to reorder, whatever else is going on. It takes the decision off your plate and out of the tired-Friday-night category entirely.
Your test strips weren’t in the last bag. They’d dropped off the repeat at a medication review months ago and you’d been coasting on a stockpile. You call the surgery to get them added back before you run out.
You realise on Saturday morning you’ve no insulin left and the surgery’s shut until Monday. NHS 111 can arrange an emergency supply of your usual insulin through a pharmacy so you’re not without it over the weekend.
Worth paying attention to
Questions that make an appointment useful
When it's urgent
If you’ve run out of insulin and can’t get more the same day, don’t wait it out. Going without insulin lets glucose climb and ketones build, which can lead to diabetic ketoacidosis (DKA), a medical emergency. Contact NHS 111 for an emergency supply of your usual insulin. If you’re already unwell with vomiting, deep or fast breathing, or drowsiness, that’s 999 territory, not something to sit on.