Frequently Asked Questions (FAQs)
About Jext® and Adrenaline
What is Jext®
Jext® is a single-use adrenaline auto-injector. Each Jext® injects a premeasured single dose of adrenaline for the emergency treatment of anaphylaxis. The needle is contained within the Jext® before use and is automatically covered by the black tip after use.1
How does adrenaline work?
Adrenaline works quickly to reverse the effects of a severe allergic reaction by increasing blood pressure and making breathing easier.2 It tightens blood vessels, reduces fluid leakage, strengthens and speeds up the heartbeat, and opens the airways.2 Adrenaline is a natural hormone made by the body, but during anaphylaxis the body cannot produce enough to counter the reaction.2 Anaphylaxis is a medical emergency, and adrenaline is a life‑saving treatment that works within minutes, lasts around 10 to 20 minutes, and is safe when given using an adrenaline device.2-3
Why is Jext® available in different doses?
The appropriate dose will be decided by your doctor, who will adjust it individually for you. Adults and Children over 30kg – the usual dose for self-administered adrenaline in allergic emergencies is 300 micrograms of adrenaline for injection into the outer thigh muscle. Children between 15kg and 30kg – the usual dose for self-administered adrenaline in allergic emergencies is 150 micrograms of adrenaline for injection into the outer thigh muscle.1 Remember: the correct dose of Jext® depends on bodyweight. The dose will need to be increased as children develop and should be discussed with your doctor.
Using Jext®
How should I use Jext®
Always use Jext® exactly as your doctor or pharmacist has told you. Make sure you understand in what situations you should use Jext®. If you are at all unsure about how to use it, ask to have the instructions repeated by your doctor, nurse or pharmacist
Grasp Jext® in your dominant hand (the one you use to write with) with your thumb closest to the yellow cap and Pull off the yellow cap with your other hand.1
Place the black injector tip against the outer thigh, holding Jext® at a right angle (approximately 90°) to the thigh. Push the black tip firmly into the outer thigh until you hear a “click”, which confirms the injection has started. Keep the autoinjector firmly pressed against the thigh for 3 seconds (a slow count to 3), then remove it. The black tip will automatically extend and hide the needle.1
Before you ever need to use it, you should familiarise yourself with Jext® and practise using a Jext® Trainer.
Can Jext® be used through clothing?
Yes, Jext® is specifically designed to inject through clothing if necessary.1
How will I know that my Jext® has worked and that I have received my medicine?
When the Jext® activates to deliver the medicine, a distinct click will be heard. The inspection window in the label will be filled by a white (Jext® 300) or blue (Jext® Jnr 150) coloured plastic rod to confirm that adrenaline has been injected and a needle guard will extend to cover the needle.1
After using Jext® what should I do?
Jext® is designed as emergency treatment. You should always seek medical attention after using it. After administering Jext®, call 000, ask for an ambulance and say ’anaphylaxis’, even if symptoms appear to be improving.1
While waiting for the ambulance, lie down with your feet raised unless this makes you breathless, in which case you should sit up. Ask someone to stay with you until the ambulance arrives in case you feel unwell again. If you become unconscious, you should be placed on your side in the recovery position.1
Inform the healthcare professional that you have received an intramuscular injection of adrenaline, and hand over the used Jext® for safe disposal. Remember to get a replacement.1
Do I need to go to the hospital after using Jext®?
Yes. You will need to go to hospital for observation and further treatment as required. This is because the reaction may happen sometime later.1
Can I use more than 2 doses of Jext® in an emergency?
Research trials only included giving one or two doses of Jext®. As per the ASCIA Action Plan for Anaphylaxis, immediately after the first dose of Jext® an ambulance should be called. If symptoms do not improve or get worse within 5-15 minutes of the first injection, another dose of Jext® can be given while waiting for an ambulance. Continue to follow your ASCIA Action Plan and take the advice of emergency services.4
Trainer Devices
How do I use my Jext® trainer?
Your Jext® Trainer works in exactly the same way as a real Jext® although there is no adrenaline and no needle in the Trainer. The Jext® Trainer has a grey label to differentiate it from the real Jext® device and “fires” quietly and less forcefully. Unlike a real Jext®, the Trainer can be reset and used as many times as you need to become familiar with the correct technique.1
How can I obtain a Jext® trainer?
You can order a Jext® Trainer through Allergy & Anaphylaxis Australia (AAA) via their online shop: https://allergyfacts.org.au/resources/shop/ or for orders larger than 20, through the Biocelect Jext® website: jext.com.au/jext-trainer-pen.
Checking my Jext®
There is an ‘air’ bubble in my Jext®, is it still OK to use?
The bubble is perfectly normal to find in Jext®. You can confidently use your Jext® as the bubble will not affect either the medication or the mechanism.1
What should I do if the liquid visible through the inspection window is no longer clear and colourless?
Contact your doctor to arrange to replace your Jext® if the adrenaline solution visible through the inspection window becomes discoloured or contains particles.1
Storage, Expiry and Disposal
How should I store my Jext®?
Jext® should be stored within the plastic carry case provided. Store below 25°C. Do not refrigerate or freeze. Protect from light.1
How can I remember to replace my Jext® when it is due to expire?
Automatic expiry alerts can be set up by registering for the Expiry Alert Service on the Jext website.
You may find it useful to put the expiry date in your calendar or diary to ensure that you replace Jext® on time.
I have noticed my Jext® is out of date, what should I do?
Contact your doctor to arrange to replace your Jext® by the expiry date stated on the label and printed on the box. The expiry date refers to the last day of the month. Automatic expiry alerts can be set up by registering for the Expiry Alert Service on the Jext website.
How do I dispose of an out-of-date Jext® which has not been used?
You should return your out-of-date Jext® to your doctor, pharmacist or any pharmacy for disposal. Do not use Jext® after the expiry date.1
Device Details
Does Jext® contain a needle?
Yes. Pushing Jext® firmly into the thigh activates a spring inside the device, which pushes the hidden needle through the tip of the device and into the thigh muscle to deliver a dose of adrenaline. The needle is not visible and is very fine, which helps reduce fear of injection and usually it does not hurt.1
Does each Jext® device contain only one dose?
Yes. Each Jext® device contains a single dose of adrenaline.1
Does Jext® come with a case?
Yes. Jext® comes in a plastic carry case to protect it while being carried or during storage.1
Side Effects and Safety
What side effects have people had when they have been given Jext®?
All medicines can have side effects. If you do experience any side effects, most of them are minor and temporary. However, some side effects may need medical attention. Some common side effects reported in research trials include reactions at the injection site such as bruising, pain and swelling, dizziness, fainting, flushing or redness of the face and skin, pale skin colour and headache. Please refer to the Jext® Consumer Medicine Information for a full list of potential side effects.1
Accessing Jext®
Is Jext® available on the PBS (Pharmaceutical Benefits Scheme)?
Yes. Jext® is available on prescription and rebated in Australia. Prescriptions are for two Jext® devices. These devices should be replaced just before they expire, and the expiry date is shown on the device.
Is the adrenaline device available to buy over the counter (OTC)?
Yes. Jext® is available to buy OTC without a prescription at full retail price (not PBS subsidised) as part of a formal anaphylaxis action plan provided by a healthcare practitioner.
Other questions about Jext
What should I tell my family, friends and colleagues?
Make sure that you tell family, friends and colleagues what to do if you were to experience anaphylaxis. They should know how to recognise the signs and symptoms and how to administer your Jext® if required. A Jext® Trainer and Action Plan may be of assistance in teaching others who may be available to help if you experience anaphylaxis. Ask them to visit this website to learn more: Anaphylaxis – Allergy & Anaphylaxis Australia.
Are there any precautions I should take with my Jext® when I go on holiday?
Yes. When travelling with your Jext® there are a few simple precautions to take: 5
- Always carry your Jext® with you, not in checked luggage, and have it easily accessible at all times.
- Make sure you have sufficient Jext® devices with you in case you lose it or need a higher dose.
- Check the expiry date before you travel and replace it if needed.
- Carry your ASCIA Action Plan for Anaphylaxis with you
- Download an ASCIA Travel Plan for people at risk of anaphylaxis from the ASCIA website and have it completed by your prescriber. This helps if you are carrying adrenaline devices in hand luggage, and through security and customs.
For more detailed travel advice, visit https://www.allergy.org.au/hp/anaphylaxis/ascia-travel-plan-anaphylaxis.
I am travelling to a very different climate to Australia and I wondered if my Jext® would still work properly?
When travelling you should take the same care of your Jext® as you would in your home country. Store your Jext® within the plastic carry case. Store below 25°C. Do not refrigerate or freeze. Protect from light.1
REFERENCES
1. Jext® 300 & Jext® Jnr 150 (adrenaline (epinephrine) acid tartrate) Australian Consumer Medicine Information. Biocelect 2026
2. Allergy Facts Australia and New Zealand (n.d.) Adrenaline hub. Available at: https://allergyfacts.org.au/adrenaline-hub/
3. Australasian Society of Clinical Immunology and Allergy (ASCIA) (2026) Adrenaline (epinephrine) devices: Frequently asked questions. Available at: https://www.allergy.org.au/images/pc/ASCIA_PC_Adrenaline_Devices_FAQ_2026.pdf
4. Australasian Society of Clinical Immunology and Allergy (ASCIA) (2026) ASCIA Action Plan for Anaphylaxis – Jext®. Available at: https://www.allergy.org.au/images/stories/anaphylaxis/2026/ASCIA_Action_Plan_Anaphylaxis_Jext_2026.pdf
5. Australasian Society of Clinical Immunology and Allergy (ASCIA) (2026) ASCIA Travel Plan for people at risk of anaphylaxis. Available at: https://www.allergy.org.au/hp/anaphylaxis/ascia-travel-plan-anaphylaxis.
