Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any injection therapy, changing your medication routine, or if you have any health concerns.

If you've been prescribed compounded semaglutide in Australia, you've probably noticed it arrives as a vial — not the pre-filled pen you might have seen advertised. That means you need your own syringes. This guide covers exactly what to get and how to use it.

GLP-1 injection supplies - insulin syringe and medication vial

1. What Is Compounded Semaglutide and Why Does It Come in a Vial?

Semaglutide — the active ingredient in Ozempic and Wegovy — has been on the TGA shortage list since 2023. As a result, Australian compounding pharmacies are legally permitted to produce semaglutide in vial form.

Unlike the branded Ozempic pen (which comes pre-loaded with a needle), compounded semaglutide in a vial requires you to draw your own dose with a syringe. This is standard practice — the same approach used for insulin, peptides, and many other injectable medications.

2. What Syringes Do You Need?

For compounded semaglutide, you need an insulin syringe — not a standard medical syringe. Here's why: semaglutide doses are tiny (0.25mg–2mg), which translates to a very small volume. An insulin syringe gives you the precision you need.

Recommended: 1ml Insulin Syringe, 29G or 31G, 6mm needle

  • Volume: 1ml — covers all common semaglutide dose ranges
  • Gauge: 29G–31G — fine enough for minimal discomfort
  • Needle length: 6mm–8mm — right depth for subcutaneous (under the skin) injection

Not sure which size is right for your dose? See our Insulin Syringe Sizes Guide for a full breakdown by dose range.

You do not need a separate draw needle. Compounded semaglutide is a water-based solution — it draws easily through a 31G insulin needle. Simply draw and inject with the same syringe.

You'll also need alcohol prep wipes — one to wipe the vial top before drawing, one to clean your injection site.

→ Shop 1ml Insulin Syringes  |  → GLP-1 Starter Kit (10 syringes + 20 wipes)

3. How to Draw Your Dose from a Vial

Drawing semaglutide dose from a medication vial with insulin syringe
  1. Wash your hands thoroughly.
  2. Wipe the rubber top of the vial with an alcohol wipe. Let it air dry for 10 seconds.
  3. Remove the syringe cap. Pull the plunger back to draw air equal to your dose volume (e.g. 0.25ml for a 0.25mg dose at standard concentration).
  4. Insert the needle through the vial's rubber top. Push the air in (this prevents a vacuum in the vial).
  5. Invert the vial. Pull the plunger back slowly to draw your dose. If bubbles appear, gently tap the syringe and push them back into the vial, then re-draw.
  6. Remove the needle from the vial. Your dose is ready.

Need help reading the graduation markings on your syringe? See How to Read an Insulin Syringe.

4. Step-by-Step Injection Technique

Subcutaneous injection technique - pinching skin fold on abdomen

Semaglutide is a subcutaneous injection — meaning it goes just under the skin, not into muscle. Common sites are the abdomen (at least 5cm from the navel), outer thigh, or upper arm. For a detailed walkthrough, see our Subcutaneous Injection Technique Guide.

  1. Wipe your injection site with an alcohol wipe. Let it dry.
  2. Pinch a small fold of skin with your non-dominant hand.
  3. Insert the needle at a 45–90° angle (45° for very lean individuals, 90° for most).
  4. Release the skin pinch. Push the plunger down slowly and steadily.
  5. Hold for 5 seconds before removing — this prevents solution from leaking back out.
  6. Remove the needle. Apply gentle pressure with the wipe if needed. Do not rub.
  7. Dispose of the needle immediately in an approved sharps container.

Rotate injection sites each week to avoid lipodystrophy (lumpy skin from repeated injections in the same spot).

5. Understanding Dose Units

Your prescription will state your dose in milligrams (mg). To convert to a syringe volume, you need to know the concentration of your compounded vial — typically written as mg/ml on the label.

Formula: Volume to inject (ml) = Dose (mg) ÷ Concentration (mg/ml)

Example: 0.5mg dose, vial concentration 2.5mg/ml → 0.5 ÷ 2.5 = 0.2ml

If you're unsure, ask your compounding pharmacy — they'll tell you the exact volume to draw for your dose.

6. Storage and Shelf Life

  • Store your vial in the refrigerator (2–8°C). Do not freeze.
  • Most compounded semaglutide vials are stable for 28–60 days once opened (check your pharmacy's label).
  • Keep the vial away from direct light.
  • Never use if the solution looks cloudy, discoloured, or has particles.
Injection supplies - syringe, alcohol wipe, and sharps container

7. Common Questions

Can I reuse a syringe?

No. Each syringe is for single use only. The needle becomes dull after one use, increasing discomfort and infection risk. Syringes are inexpensive — use a fresh one every injection.

How do I dispose of used syringes in Australia?

Place used syringes in an approved sharps container. These are available from most pharmacies. Full containers can be dropped off at participating pharmacies or local council disposal points. Never put loose syringes in general waste.

What if I'm not sure which syringes to buy?

Our GLP-1 Starter Kit includes 10 x 1ml insulin syringes and 20 alcohol wipes — everything you need for your first 10 weeks of weekly injections, delivered to your door.

Do I need a prescription to buy syringes in Australia?

No. Insulin syringes and alcohol wipes are available over the counter and online without a prescription in Australia.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any injection therapy, changing your medication routine, or if you have any health concerns.

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