Injection Supplies & Sharps Disposal in SA

Most of the questions we get are about compounds. Far fewer are about the equipment, and yet the equipment is where a lot of avoidable problems start: the wrong syringe for the dose, a needle used five times because it still looked sharp, a lipid lump in the one patch of stomach that gets every injection, and a bin bag full of loose needles that somebody else has to handle.

None of this is complicated. This guide covers what you actually need, how to read the syringe you are using, what the evidence says about needle length and reuse, and what to do with used sharps in South Africa, where the honest answer is that most people get it wrong.

What You Need

For a vial-based protocol the list is short:

• Bacteriostatic water to reconstitute the powder. It is sterile water with 0.9% benzyl alcohol, which is what lets you draw from the same vial repeatedly over several weeks. Plain sterile water has no preservative and is meant for single use. We supply bacteriostatic water in 3 ml and 10 ml vials.
• Insulin syringes for drawing up and injecting. These are sold at South African pharmacies. More on sizes below.
• Alcohol swabs, 70% isopropyl, for the vial stopper and the injection site.
• A sharps container for used needles, from day one rather than once you have a drawer full of them.

If you use a pre-filled peptide pen instead, you skip the water and the reconstitution, but pen-injectors take disposable screw-on pen needles. Those are sharps too, and they go in the same container.

For the reconstitution itself, our storage and reconstitution guide walks through each step, and the reconstitution calculator does the arithmetic for you.

Reading a U-100 Syringe

Almost every insulin syringe sold in South Africa is U-100, which means it is calibrated so that 100 units equals 1 ml. One unit is therefore 0.01 ml.

The units have nothing to do with the peptide. They are simply a volume scale printed on the barrel. What turns a volume into a dose is the concentration of your reconstituted vial, and that depends on how much water you added. This is the step people most often get wrong, and it is why we built the calculator rather than printing a table.

Syringes come in three common barrel sizes:

The smaller the barrel, the further apart the markings, and the easier it is to measure a small dose accurately. If your dose works out to 8 units, a 0.3 ml or 0.5 ml syringe will give you a far more reliable measurement than a 1 ml syringe marked in 2 unit steps.

Needle Length and Gauge

Needle gauge is the thickness, and a higher number is thinner. Insulin syringes are typically 29 to 31G, which is why most people find them far less uncomfortable than they expect.

Needle length matters more than most people realise. The aim of a subcutaneous injection is the fat layer under the skin, not the muscle below it.

An ultrasound study of 388 adults with diabetes measured skin at an average of about 2 mm thick at the usual injection sites, with considerably more variation in the fat layer underneath. The authors concluded that 4 to 5 mm needles inserted straight in reach the subcutaneous layer with minimal risk of hitting muscle in virtually all adults, while needles of 8 mm and longer may frequently enter muscle in the limbs of lean people.

That finding fed into the international FITTER injection technique recommendations, written by 183 diabetes experts from 54 countries, which advise that the shortest needles, 4 mm for pens and 6 mm for syringes, should be the first-line choice for everyone. They are safe, effective and less painful.

In practice:

• With a 4 mm pen needle or a 6 mm syringe needle, most adults can inject straight in at 90 degrees.
• If you only have 8 mm or longer needles, or you are injecting a very lean area, lift a gentle fold of skin or angle the needle to reduce the chance of going into muscle.
• Leave the needle in for a few seconds after pressing the plunger so the full dose is delivered.

One Needle, One Injection

It is tempting to reuse a syringe that still looks fine. Under magnification it is not fine. The tip can dull and bend after a single use, and a used needle is no longer sterile.

A study of 430 people injecting insulin found that nearly two thirds had lipohypertrophy, the rubbery lumps of fatty tissue that form under repeatedly injected skin, and that the risk rose significantly when needles were reused more than five times. Lipohypertrophy is not just cosmetic: injecting into it changes how a compound is absorbed.

The same study found the biggest single protective factor was site rotation. Only 5% of people who rotated correctly developed lipohypertrophy. Divide the abdomen into quadrants, move at least a finger's width from the last injection each time, and do not return to the same spot for a few weeks.

The South African Sharps Problem

This is the part that gets the least attention, and South African data shows why it should get more.

A study at a Durban hospital asked 132 insulin users what they did with used needles. 88% put them straight into the household bin. 6% flushed them down the toilet. Only 2.2% returned them in a puncture-resistant container for proper disposal. Of the five patients who had been taught how to dispose of sharps, three did it correctly. Of the 127 who had not been taught, none did.

A 2023 study of 308 insulin users in rural KwaZulu-Natal found the same pattern a decade later: 62.3% lacked knowledge of proper sharps disposal, most commonly because nobody had ever explained it to them.

Loose needles in household waste injure refuse collectors, recyclers and waste pickers, and anyone who handles your bin. That is the whole reason to care.

How to Dispose of Sharps in South Africa

Use a proper sharps container. These are rigid, puncture-resistant and have a one-way lid. Pharmacies and medical suppliers stock them. Drop the whole syringe in immediately after use. Do not recap it first; recapping is a common cause of needlestick injuries.

Stop at three quarters full. Overfilling a sharps container increases the risk of a needlestick injury. Close and lock the lid once it reaches the fill line.

Return it. South African guidance aimed at people who inject at home is to take a full, sealed container back to the pharmacy where you bought your supplies, or to a clinic or hospital that has a sharps disposal service. Policies differ from branch to branch, so ask before you arrive with it.

If you cannot get a sharps container, a rigid plastic bottle with a screw lid, such as an empty detergent bottle, is the fallback. Seal the lid with tape, label it clearly as sharps, and return it the same way. A soft plastic bottle, a cooldrink can or a bag is not an alternative.

Never put loose needles in the bin, in recycling or down the toilet.

A Simple Setup That Works

Keep everything in one place: a small box holding unopened syringes, swabs and the sharps container, next to where you store your vials. When the syringes run low, buy a new sharps container with the next box so the old one goes back to the pharmacy on the same trip.

If you are new to self-injection, our beginner's guide covers the full routine, and for storing vials in South African summers see storing peptides in a South African climate.

The Bottom Line

The right syringe makes your dose accurate, the right needle keeps it in the fat layer, a fresh needle every time protects the tissue you inject into, and a sharps container protects everyone else. None of it is expensive, and all of it is easy once it becomes routine.

Sources

The research and guidance behind the claims in this article:

• Frid AH, Kreugel G, et al. New insulin delivery recommendations (FITTER). Mayo Clinic Proceedings, 2016.
• Gibney MA, Arce CH, et al. Skin and subcutaneous adipose layer thickness in adults with diabetes at sites used for insulin injections: implications for needle length recommendations. Current Medical Research and Opinion, 2010.
• Blanco M, Hernández MT, et al. Prevalence and risk factors of lipohypertrophy in insulin-injecting patients with diabetes. Diabetes & Metabolism, 2013.
• Govender D, Ross A. Sharps disposal practices among diabetic patients using insulin. South African Medical Journal, 2012.
• Ziqubu L, Sokhela DG, Gabela SD. Knowledge, attitudes and practices of sharps waste disposal by diabetic patients in rural South Africa. South African Family Practice, 2023.
• Sweet Life. What do you do with used needles?. Sweet Life Diabetes Community, 2022.
• US Food and Drug Administration. Best way to get rid of used needles and other sharps. FDA.
• US National Library of Medicine, DailyMed. Bacteriostatic Water for Injection USP, prescribing information (0.9% benzyl alcohol as preservative). DailyMed.

Disclaimer: The information in this article is for educational purposes only and is not medical advice. STRIATA peptides are research compounds and are not approved medicines. Always consult a qualified healthcare professional before beginning any protocol.