How to Take GLP1 Injections in Australia: A Step by Step Patient Guide
TL;DR
GLP1 receptor agonist injections (including medications such as Mounjaro, Wegovy, and Ozempic) are administered once weekly as a subcutaneous injection into the stomach, thigh, or upper arm. The technique is the same across all GLP1 pens: wash your hands, check the medication, choose and clean your injection site, inject at a 90 degree angle, hold for the recommended time, and dispose of the needle safely. Your prescribing doctor and pharmacist will walk you through the specific instructions for your pen. This guide covers the general principles that apply across all GLP1 injectable medications available in Australia.
If you have been prescribed a GLP1 injection for the first time, the idea of self-injecting can feel daunting. You are not alone. Thousands of Australians are starting GLP1 receptor agonist treatment each month, and the most common question new patients ask is simply: how do I actually use this pen?
The good news is that GLP1 injection pens are designed for home use by patients with no medical training. Whether your doctor has prescribed tirzepatide (sold as Mounjaro), semaglutide (sold as Wegovy or Ozempic), or another GLP1 medication, the core injection technique is very similar across all of them. This guide covers the general steps, injection site options, storage requirements, and answers to the questions Australian patients ask most often.
What Are GLP1 Receptor Agonist Injections?
GLP1 receptor agonists are a class of injectable prescription medicines that mimic natural hormones involved in blood sugar regulation and appetite signalling. In Australia, several GLP1 medications are registered on the Australian Register of Therapeutic Goods (ARTG) and available by prescription through an AHPRA-registered doctor.
The most commonly prescribed GLP1 injectable medications in Australia include:
Tirzepatide (brand name: Mounjaro KwikPen), which is a dual GIP/GLP1 receptor agonist supplied as a multi-dose pre-filled pen containing four weekly doses per pen.
Semaglutide (brand names: Wegovy and Ozempic), which is a GLP1 receptor agonist supplied as single-dose pre-filled pens, one injection per pen.
While each medication has different dosing schedules, pen designs, and clinical indications, the fundamental injection technique is the same: a subcutaneous injection (under the skin) administered once per week.
How Do You Prepare for a GLP1 Injection?
Preparation is the same regardless of which GLP1 pen you have been prescribed. Before every injection, follow these steps to make sure your medication is safe to use.
First, wash your hands thoroughly with soap and water. This reduces the risk of infection at the injection site.
Second, remove the pen from the refrigerator and let it reach room temperature for 15 to 30 minutes before injecting. Cold medication can cause more discomfort during injection. Do not microwave or heat the pen.
Third, check the pen label to confirm it is the correct medication and the correct dose. GLP1 pens come in different dose strengths, often identified by colour-coded labels.
Fourth, inspect the medication through the viewing window on the pen. The liquid should be clear and colourless to slightly yellow. Do not use the pen if the liquid is cloudy, discoloured, or contains visible particles.
Fifth, check the expiration date. Never use an expired pen.
If your pen requires a separate needle (as the Mounjaro KwikPen does), attach a new pen needle before each injection. The Wegovy and Ozempic pens have the needle already built in and hidden inside the base.
Where Should You Inject a GLP1 Medication?
GLP1 injections are given subcutaneously (under the skin) in one of three areas: the abdomen (at least 5cm from the belly button), the front of the thigh (upper leg), or the back of the upper arm (if administered by another person). Rotate your injection site each week to prevent skin irritation and lipodystrophy. All three sites provide equivalent medication absorption for GLP1 receptor agonists.
Your prescribing doctor or pharmacist will recommend the best injection site for you. Most patients find the abdomen the easiest site for self-injection because the skin is accessible and there is usually enough subcutaneous tissue for a comfortable injection.
The thigh (front of the upper leg) is the second most common choice. Some patients using the Mounjaro KwikPen report a preference for thigh injections. Wegovy and Ozempic patients can also use the thigh.
The upper arm (back of the arm, between the shoulder and elbow) is suitable when someone else is giving the injection for you, such as a family member or carer. It is difficult to self-inject in this area.
Whichever site you choose, rotate the exact spot each week. Do not inject into the same location repeatedly. Avoid areas with scars, bruises, stretch marks, or skin irritation. If injecting into the abdomen, stay at least 5 centimetres away from the belly button.
How Do You Inject a GLP1 Pen Step by Step?
The exact steps vary slightly between pen types, so always read the Instructions for Use (IFU) leaflet included with your medication. The general process for all GLP1 pens is as follows.
Step 1: Clean the injection site
Wipe the chosen injection area with an alcohol swab and let it air dry completely. Do not blow on it to speed drying.
Step 2: Prepare the pen
For pens with separate needles (such as the Mounjaro KwikPen): attach a new needle, remove the outer and inner needle caps, and prime the pen according to the IFU by turning the dose knob and pressing the injection button until a droplet appears at the needle tip.
For pens with built-in needles (such as the Wegovy FlexTouch pen or Ozempic pen): remove the base cap. The needle is hidden and will only extend when the pen is pressed against your skin.
Step 3: Inject
Pinch a fold of skin at your chosen injection site if instructed by your doctor. Insert the needle at a 90-degree angle (straight in). For pens with a button, press and hold the injection button until the dose indicator returns to zero or the pen clicks to confirm the full dose has been delivered. For auto injector style pens (Wegovy, Ozempic), press the pen firmly against the skin and hold until you hear the second click.
Step 4: Hold and remove
Keep the needle in the skin for the time specified in your pen’s IFU. This is typically 5 to 10 seconds. This allows the full dose to be absorbed and reduces the chance of medication leaking from the injection site.
Step 5: Dispose of the needle safely
Place the used needle (or the entire single-use pen) into an approved sharps container. In Australia, you can obtain a free sharps container from most pharmacies. Never put used needles in household rubbish bins. When your sharps container is full, return it to your pharmacy or local council collection point for safe disposal.
For detailed visual instructions, watch the video below from a qualified healthcare professional demonstrating the injection process.
How Should You Store GLP1 Injection Pens in Australia?
Correct storage is essential for medication effectiveness and safety. The storage requirements are similar across all GLP1 pens available in Australia.
Before first use, store the pen in the refrigerator at 2 to 8 degrees Celsius. Do not freeze. If a pen has been frozen, do not use it. Keep the pen in its original carton to protect it from light.
After first use, the Mounjaro KwikPen can be stored at room temperature (below 30 degrees Celsius) for up to 21 days. The Wegovy pen can be stored at room temperature for up to 28 days. The Ozempic pen can also be stored at room temperature (below 30 degrees Celsius) for up to 56 days after first use. Always check the specific storage instructions in your pen’s Consumer Medicine Information (CMI) leaflet.
When travelling in Australia, use an insulated cooler bag with a gel ice pack if ambient temperatures exceed 30 degrees (common in many parts of Australia, especially during summer). Do not place the pen directly on ice or in a freezer compartment.
What Should You Do if Something Goes Wrong with Your Injection?
Minor issues during injection are common, especially in the first few weeks. Here is what to do if you encounter the most frequently reported problems.
A small amount of bleeding at the injection site
A small drop of blood at the injection site is normal and does not affect the medication. Apply gentle pressure with a clean cotton ball or gauze for 30 seconds.
Bruising at the injection site
Mild bruising can occur. This does not mean the injection was done incorrectly. To reduce bruising, avoid areas with visible veins, do not rub the site after injection, and make sure you are rotating sites weekly.
Medication leaking from the injection site
If you notice a drop of liquid at the injection site after removing the needle, you may not have held the pen in place long enough. Hold for the full recommended time (5 to 10 seconds) on your next injection. Do not re-inject to make up for a suspected partial dose without speaking to your doctor.
The pen appears stuck or will not dispense medication
If your pen is not working correctly, do not force it. Contact your pharmacist or the manufacturer’s helpline listed on the pen packaging.
How Often Do You Take GLP1 Injections?
All GLP1 receptor agonists currently available in Australia are administered once per week. You should choose a consistent day each week and try to inject at approximately the same time.
If you miss a dose and it has been fewer than 4 days since your scheduled injection, take it as soon as you remember. If more than 4 days have passed, skip the missed dose and take your next dose on the regularly scheduled day. Do not take two doses within the same week to make up for a missed dose.
Your doctor will start you on a low dose and gradually increase it over several weeks. This is called dose titration. It helps your body adjust to the medication and reduces the likelihood of gastrointestinal side effects such as nausea. Never adjust your dose without guidance from your prescribing doctor.
Important: This information is for general education only
This guide provides general information about the GLP1 injection technique and is not a substitute for the Instructions for Use (IFU) included with your specific medication or the personalised advice of your prescribing doctor and pharmacist.
GLP1 receptor agonist medications are Schedule 4 prescription-only medicines in Australia. They can only be obtained with a valid prescription from an AHPRA-registered doctor who has assessed your individual suitability.
If you experience any unexpected reactions after an injection, contact your prescribing doctor, call 13 HEALTH (13 43 25 84), or in an emergency, call 000.
Frequently Asked Questions About GLP1 Injections
Does a GLP1 injection hurt?
Most patients report that GLP1 injections cause minimal discomfort. The needles used are very fine (typically 4mm to 5mm, 32 gauge). Many patients describe the sensation as a brief pinch. Allowing the pen to reach room temperature before injecting can reduce discomfort. Pain tolerance varies, but the majority of patients find the injection manageable after their first experience.
Can you inject a GLP1 medication in your arm by yourself?
Self injection in the upper arm is not recommended because it is difficult to pinch the skin and control the pen angle with one hand. The abdomen and thigh are the preferred self-injection sites. If you prefer the upper arm, ask a family member, carer, or healthcare professional to administer the injection for you.
What happens if you inject a GLP1 medication into a muscle instead of fat?
GLP1 medications are designed for subcutaneous injection (into the fat layer beneath the skin), not intramuscular injection. Injecting into the muscle may cause the medication to be absorbed faster than intended, which could increase side effects. Using the correct technique (pinching the skin, injecting at 90 degrees, using the recommended needle length) minimises this risk. If you are concerned, speak to your pharmacist or doctor about needle length.
Where do you get a sharps container in Australia?
Most Australian pharmacies provide sharps containers free of charge under state and territory needle and syringe programs. You can also purchase them from Chemist Warehouse, Priceline Pharmacy, and other major pharmacy chains. When full, return the sealed container to your pharmacy or a local council sharps collection point. Do not dispose of sharps containers in household waste or recycling bins.
Can you travel with GLP1 injection pens on an Australian domestic flight?
Yes. Under current Australian aviation security rules, prescription injectable medications are permitted in carry-on luggage. Carry your medication in its original packaging with the pharmacy label visible, and bring a letter from your prescribing doctor confirming the medication is prescribed to you. Keep the pen in an insulated travel case to maintain the correct temperature during transit.
Getting Confident with Your GLP1 Injection Routine
Self-injecting a GLP1 medication feels unfamiliar at first, but most patients become comfortable with the process within two to three weeks. The key is preparation: read your pen’s Instructions for Use carefully, choose a consistent injection day, rotate your injection sites, and store your medication correctly.
If you have questions about your injection technique, your pharmacist is an excellent first point of contact. They can demonstrate the process using a training pen and answer questions specific to your prescribed medication.
For patients who have not yet started treatment and want to understand whether a medical weight loss program might be suitable, speaking with an AHPRA-registered GP through a telehealth consultation can help clarify your options and eligibility.