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Jext 0.3mg Pen

Jext 0.3mg Pen

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Prescription Range

Jext 0.3mcg pen is a pre-filled adrenaline auto injector emergency treatment for severe allergic reactions or anaphylaxis. It contains adrenaline and is designed to be administered into the outer thigh muscle in an allergic emergency. It works by preventing blood pressure from dropping dangerously low.

  • Adrenaline auto injector for emergency use when experiencing anaphylactic reaction
  • For fast treatment of anaphylaxis and severe allergic reactions
Anaphylaxis
General Health
Price
£73.99

Jext 0.3mg Pen

Pack Size: 1 x Jext Pen

£73.99

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Buy Jext 0.3mg Pen Online

Jext 0.3mg pen is a prescription-only, pre-filled adrenaline auto injector used to treat anaphylaxis in a medical emergency.

Buy Jext injection pen online from our secure online pharmacy service after a short consultation with one of our doctors or pharmacists.

When to Use the Jext 0.3mg Pen?

The Jext 0.3mg pen is an adrenaline auto-injector offering emergency treatment for acute allergic reactions brought on by allergens, including foods, bites, and stings.

If you have an allergy and are suffering from any of the following, you should use the pen immediately:

  • Breathing Issues: Coughing, problems swallowing, wheezing, and a tight throat.
  • Circulation Issues: Other signs of an allergic reaction include suddenly feeling tired, dizzy, faint or losing consciousness, and clammy skin.
  • Swelling: Swelling of the throat and tongue also requires instant attention.
  • Skin Symptoms: Itching and skin rashes - including hives - are common signs of allergic reactions.

Even if you're unsure of whether the reaction will likely be severe, you should still use the adrenaline injection immediately, as a minor reaction can quickly become life-threatening.

Jext 0.3mg Pen Age Restrictions

The Jext injector doesn't have specific age restrictions. Instead, it's only recommended for adults and children over 30kg (4.7 stone).

Please don't administer the pen to anyone who doesn't meet these requirements, unless it's the only available option. You'll also need to reduce the dosage.

How to Use the Jext Adrenaline Pen?

While the Jext pen is simple to use, following the instructions carefully is essential. These include:

  1. Site Preparation: Hold the Jext pen around the middle and ensure your thumb is close to the yellow cap. Use your other hand to pull off the yellow cap, which prepares the injection.
  2. Inject: Hold the black injector tip to the thigh's outer side, at a right angle. These injections can go through most types of clothing, but avoid administering them near thick seams, zippers, and buttons. Push down the black tip until you hear a clicking sound, and count for 10 seconds.
  3. Post-Injection: After removing the injector, check the window to ensure a coloured rod is visible. This means that the adrenaline was successfully injected. Then, massage the injection site for 10 seconds to ensure absorption.

Please note that it's best to immobilise a child's legs when administering adrenaline to ensure they receive the full dose.

When to Avoid Using Jext 0.3mg Pen?

As a potentially life-saving treatment, the Jext pen is suitable for anyone with allergies during a severe reaction (analyphalatic shock).

However, it shouldn't be administered to individuals who don't have allergies or people under 30kg - unless it's an emergency situation.

If any of the following apply, you should avoid using the pen:

  • Past Expiry Date: Adrenaline will degrade over time. In absolute emergencies, where you only have an expired pen, you should still use it.
  • Discoloured Solutions: Check the inspection window before removing the cap. If it's cloudy or discoloured, discard that pen and use another one.

Precautions for Jext 0.3mg Pen

Please take care when using the pen, as injecting it into the wrong site can result in complications.

The most important places to avoid include the buttocks and the lower extremities, which can compromise blood flow.

Accidentally injecting the pen into a vein is highly unlikely, but seek instant medical care if you do, as it can cause a heart attack.

Ingredients of Jext 0.3mg Pen

Adrenaline (Epinephrine) is the active ingredient in the Jext Pen, but it also has inactive ingredients, including:

  • Sodium Metabisulphite
  • Water
  • Hydrochloric Acid
  • Sodium Chloride

Side Effects of Jext 0.3mg Pen

Like all medicines, Jext auto injector can have side effects.

Side effects of adrenaline can include heart problems like a rapid heartbeat and chest pain, sweating, nausea, vomiting, anxiety and tremors, and difficulty breathing.

However, the side effects of adrenaline outweigh the risk of not administering it.

Leaflets

Jext 0.3mg Pen Patient Information Leaflet

Please read the Jext Patient Information Leaflet carefully before using the pen. If you're unsure how to use the auto injector or have any questions, please contact our registered pharmacists for advice.

Jext Patient Information Leaflet

Umar Razzaq, MPharm | University of Strathclyde, Clinical Pharmacist.
Content Written by:Umar RazzaqMPharm | University Of Strathclyde
Date Written:01/03/2024
Role:Clinical Pharmacist
Nish Fayyaz, MPharm | University of Strathclyde, Pharmacist.
Medically Reviewed By:Nish FayyazMPharm | University Of Strathclyde
Date Checked:30/05/2025
Role:Pharmacist
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