practicalhow-to
Injection technique and site rotation
The small mechanical details that make a weekly injection comfortable rather than dreaded, and why rotating sites is the one bit worth being systematic about.
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How to get a sharps bin, what to do when it is full, and how the rules differ across the UK, Ireland, the EU, the US, Canada and Australia.
7 min read1.3k wordsUpdated 30 April 2026Reviewed by Ren
This is the least interesting guide on the site and the one members most often wish they had read a week earlier. The pattern is depressingly consistent: the medicine arrives, the first dose happens, and then there is a used needle on a kitchen worktop and a person searching the internet at ten at night.
So: a sharps container, obtained before you inject anything. It is a rigid, lidded, yellow-topped box designed so that nothing can be pulled back out and nothing can pierce the sides. It is not a jam jar, not a plastic milk bottle, not a drinks can, and not a takeaway tub. Rigid plastic bottles get recommended constantly online as an improvised option and are refused by most collection services, which means you end up with the same problem plus a bottle of needles.
Where the bin comes from depends entirely on where you live, and the next sections cover that. But the universal part is this: whoever prescribed or dispensed your medicine is the first person to ask. Pharmacies deal with this question daily and will usually either hand you a bin, sell you one cheaply, or tell you precisely which local scheme applies. Ren's line in the practical circle is that thirty seconds of asking beats an hour of searching, every time.
Anything sharp that has been in contact with you or with the medicine. Used pen needles. Used syringes with the needle attached — do not try to separate them. Single-use disposable pens go in whole, needle and all, which is why the bin you want is a reasonably large one. Lancets, if you also test blood glucose.
What does not go in: cardboard packaging, the leaflet, empty cartons, alcohol wipes, cotton wool. Filling the bin with paper is a real problem because you pay by the box in a lot of places and because a bin that looks full of rubbish gets queried.
Never recap a needle. The single most common needlestick injury in this whole area happens while trying to put a tiny cap back onto a tiny needle, usually one-handed, usually while distracted. The needle goes into the bin as it comes out of you, uncapped, immediately. If you use pens with screw-on needles, most bins have a moulded slot in the lid designed to unscrew the needle for you without your fingers going near it.
Fill to the marked line and no further. There is a line printed on the box. Above it, the lid stops closing safely and the collection service is entitled to refuse it.
In the UK, sharps disposal is a council responsibility and the experience varies wildly by postcode. Many councils run a free collection: you request it online, they deliver a bin or you collect one, and they take the full one away. Some collect from the doorstep on a set day. A minority charge a fee, and a few will only supply bins to people whose sharps use is recorded by a health service — which is a real problem for members who are paying privately, and one Petra has taken up more than once.
Community pharmacies are the other route, and this is where it gets frustrating: some run a sharps return scheme and some do not, and it is often down to the individual branch and its contract. Ask, and if the first says no, ask another. Members have had good luck with pharmacies attached to GP practices.
In Ireland, pharmacies are again the practical first stop, and a number of local authorities accept sharps at civic amenity or recycling centres — usually in an approved container, sometimes only on certain days. Rowan, who is in Cork, ended up with a pharmacy arrangement after two councils gave contradictory answers on the phone, which is a very ordinary story.
Wherever you are in these islands, do not put sharps in household refuse or recycling. Waste operatives get injured, and it is the one part of this that has consequences for somebody other than you.
EU. Rules are national and often municipal. In much of Germany, Austria and the Netherlands, pharmacies take back sharps as a matter of course. In France, a national scheme supplies free approved containers through pharmacies to people using self-injected treatments, with designated drop-off points. In Spain and Italy, pharmacy return is common but not universal. If you have moved recently, ask at a pharmacy in your own language before you assume the rules from your previous country apply.
United States. There is no single national rule; the FDA's public guidance is to use an approved container and then follow your state and local requirements, which range from household hazardous waste drop-off, to pharmacy or hospital take-back, to mail-back programmes where you post a sealed container to a licensed processor. Mail-back kits cost money, and for members without a local option they are usually the answer.
Canada. Pharmacy return is the norm in most provinces, frequently free, and many pharmacies will also supply the container.
Australia. Community sharps bins exist in many public locations, and state and territory health services run needle and syringe programmes that supply and accept containers. Council rules on kerbside collection differ, so check the local authority site rather than assuming.
You are moving house or country mid-bin. Seal it, tape the lid, transport it upright in a boot rather than a suitcase, and dispose of it under the rules of wherever you land. Do not take a part-full sharps bin through airport security in hand luggage.
Do not fly with loose used needles at all. Travelling with a pen covers what to do with a used device while you are away, which is usually: bring a small travel container, or ask the hotel or a local pharmacy.
You live in a shared house or halls. Keep the bin in your own room, out of reach of anyone who does not know what it is, and do not leave it in a communal kitchen. Members in student accommodation have generally found their accommodation office already has a procedure, because they deal with insulin users constantly.
You have children or pets. High shelf, lid closed between doses, and the injection ritual done with the bin present rather than fetched afterwards. This is the entire argument for putting the device straight in.
Somebody gets a needlestick. Encourage the wound to bleed gently under running water, wash it with soap, do not scrub or suck it, cover it, and seek medical advice the same day. Do not sit on it out of embarrassment.
Sharps disposal is one of the small ongoing costs nobody mentions when they quote you a monthly price for treatment. In much of the UK it is genuinely free. In parts of the US, mail-back kits are a recurring expense that can matter a great deal on a tight budget. Members paying privately are the group most likely to fall through the gaps in every country we have data on, because the schemes were built around health-service-supplied treatment.
Two things that help. First, a larger bin used to its fill line is cheaper per dose than a stream of small ones, so if you have somewhere safe to keep it, size up. Second, ask the prescribing service directly whether disposal is included — private weight-management providers vary enormously and some will send containers with the medicine if asked, but almost none advertise it.
If cost is the barrier, say so out loud in paying out of pocket rather than improvising with a bottle. Somebody in your region has usually already found the free route, and Petra keeps a running list of what members have confirmed works where. See also paying out of pocket without panic.
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