Jext is a brand of adrenaline (epinephrine) auto-injectors. It’s a device that contains adrenaline and is designed to be easy to inject in emergencies. It’s used for the emergency treatment of severe allergic reactions (anaphylaxis). 

It should be used as soon as you suspect a serious allergic reaction. It can be self-administered or administered by someone else who is helping you.

Anaphylaxis, or anaphylactic shock, is a severe and potentially life-threatening reaction to a trigger like an allergy. It happens when the body's immune system overreacts to a trigger.

This overreaction can cause various symptoms such as swelling of the throat, lips and tongue, rash, breathing difficulties including shortness of breath and trouble breathing, vomiting, and nausea.

It can also lead to serious problems with the cardiovascular system and blood flow

Anaphylaxis is a medical emergency and you should always call 999 for help, even if you have used an adrenaline auto-injector to treat it.

Jext pens work by delivering adrenaline into the body with an injection. Each adrenaline pen contains a single adult dose of adrenaline.

The Jext injections works on the respiratory system and the cardiovascular system to stop the serious effects of anaphylaxis. It causes blood vessels to constrict, stimulates heartbeat, relaxes muscles in the lungs to improve breathing, and reduces swelling.

Before using a Jext injector pen you should have been trained on how to use it and be familiar with the Jext instructions.

As well as knowing how to use the Jext pen yourself, you should also make sure that the people you spend time with also know how to administer this emergency injection, incase you're unable to do it yourself.

You should always carry two Jext pens with you, because sometimes one dose isn't enough.

The recommended dose for adults and children who weigh over 30kg is Jext 300 micrograms injected into the outer thigh muscle for allergic emergencies.

It’s recommended that children who weigh between 15kg and 30kg use Jext 150mcg for allergic emergencies. At Pharmacy Online, we only offer the 300mcg strength for use in adults over 18 years old.

If you’re not sure about the correct dose for you, speak to your GP for advice.

Sometimes a single dose of adrenaline may not be sufficient to completely reverse the effects of a serious allergic reaction. This is why you should always carry 2 adrenaline pens.

If symptoms have not improved within 5 - 15 minutes of the first injection, you should use a second injection.

Jext will typically start to work immediately, reducing symptoms of anaphylaxis. If symptoms persist, you may need to immediately administer a second injection.

You should always call for emergency assistance when you experience a severe allergic reaction or anaphylactic episode, even if you have successfully administered adrenaline.

You can buy Jext adrenaline auto-injectors from our UK registered online pharmacy and doctor service. As part of your order, simply complete an online assessment for our prescribers to review.

This service is only available to patients who have been prescribed this medicine by their GP previously.