What is Jext®?
Jext® is the medicine you have been given by your doctor to help treat allergic reactions (anaphylactic shock).1,2
Once you have used your Jext®, it works quickly while you wait for the ambulance to arrive.1,2 The liquid medicine inside Jext® is called adrenaline, Jext® automatically puts the adrenaline into your body.1,2
Using Jext®
Your doctor should explain when and how to use Jext®. If you feel like you are having an allergic reaction it is important that you use your Jext® immediately.1,2
Why have I been prescribed Jext®?
Your doctor has given you Jext® because your body has reacted badly to something in the past, such as a type of food or an insect sting. In other words, you had an allergic reaction to something.1,2
You may react again in the future to whatever it is that your body doesn’t like. There is also a chance that next time you may have a more severe allergic reaction called an anaphylactic reaction.1,2
Jext® comes in two different doses1,2
15-30kg150 micrograms if you weigh between 15-30kg
>30kg300 micrograms if you weigh over 30kg
How to use Jext®1
Step 1
Grasp the Jext® in your dominant hand (the one you use to write with) with your thumb closest to the yellow cap.
Step 2
Pull off the yellow cap with your other hand.
Step 3
Place the black injector tip against your outer thigh, holding the injector at a right angle (approx. 90°) to the thigh.
Step 4
Push the black tip firmly into your outer thigh until you hear a ‘click’ confirming the injection has started, then keep it pushed in. Hold the injector firmly in place against the thigh for 10 seconds (a slow count to 10) then remove. The black tip will extend automatically and hide the needle.
Step 5
Massage the injection area for 10 seconds. Seek immediate medical help.
Extra steps to take
Seek medical attention
Call 999 in the UK, or 112 for Ireland, ask for an ambulance and say “anaphylaxis”. If you are alone when you have a reaction, you will have to make the call yourself. Don’t worry, the person who answers the phone will know exactly what to do.
Be prepared
Use a second Jext® after 5 minutes if the symptoms do not improve. Always carry an extra Jext® with you.1,2
Stay where you are
You should remain still and laid down until the ambulance arrives. Don’t try to get up, even if you start to feel better.1,2
Video demonstration
Watch the demonstration video to familiarise yourself, family and friends with what to do in the event of an anaphylactic reaction, how to recognise the symptoms, and how to administer Jext®.
*Educational Risk Minimisation Materials to help reduce the risk associated with using this medicine.
When to use Jext®
There are lots of different symptoms that can appear when you have a severe allergic reaction (anaphylaxis), some of them can happen quickly within minutes and some can take a little longer.
It is important to remember that the symptoms you experience may be different from previous reactions you’ve had and if any of the following symptoms of anaphylaxis occur, you must immediately use your Jext®.1,2
Symptoms
Only a few of the following symptoms may be present, however some can be VERY SERIOUS.1,2
- Itching of the skin
- Raised rash (like a nettle rash)
- Flushing
- Swelling of the lips, throat, tongue, hands and feet
- Wheezing, hoarseness, shortness of breath
- Nausea, vomiting and stomach cramps
- Vomiting, diarrhoea, cramps
- In some cases, loss of consciousness
Remember
If you experience symptoms of anaphylaxis you should:
- Use a Jext® straight away, or ask someone to help you use Jext®
- Dial 999 in the UK, or 112 in Ireland, ask for an ambulance and say ‘anaphylaxis’ or ask someone else to make the call for you
References
1. EMC. 2023. Jext® 300micrograms solution for injection in pre-filled pen Patient Information Leaflet
2. EMC. 2023 Jext® 150micrograms solution for injection in pre-filled pen Patient Information Leaflet
January 2025
IE-JXT-2400022