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Pharmacy, clinic and prescribers based in Greater Manchester.
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Jext 300 Solution for Injection is a pre-filled emergency adrenaline auto-injector containing 300 micrograms of adrenaline (epinephrine) in 0.3ml. It is used for the emergency treatment of severe allergic reactions (anaphylaxis) caused by foods, medicines, insect stings or bites, latex, or other allergens.
Jext 300 is designed for rapid administration into the outer thigh and is suitable for adults and children weighing over 30kg (approximately 66 lbs). It delivers a single measured dose of adrenaline to help reverse life-threatening symptoms such as difficulty breathing, swelling of the throat, sudden drop in blood pressure, and severe skin reactions.
It is a Prescription Only Medicine (POM) and should always be carried by individuals at risk of anaphylaxis.
| Medication Name | Jext 300 Solution for Injection |
| Active Ingredient | Adrenaline (Epinephrine) 300 micrograms in 0.3ml |
| Medication Form | Pre-filled adrenaline auto-injector pen |
| Used to Treat | Emergency treatment of anaphylaxis (severe allergic reactions) |
| Suitable For | Adults and children over 30kg body weight |
| Prescription Required? | Yes – Prescription Only Medicine (POM) |
Jext 300 is used for the emergency treatment of anaphylaxis. Anaphylaxis is a sudden, severe allergic reaction that may include breathing difficulties, swelling of the lips or throat, rash, itching, dizziness, collapse, or loss of consciousness. Immediate injection of adrenaline can be life-saving while waiting for emergency medical assistance.
Jext 300 is suitable for:
Do not use Jext 300 if:
Speak to your doctor before use if you:
A second Jext 300 injection may be required after 5–15 minutes if symptoms do not improve. Always seek emergency medical help after using the auto-injector.
Very common or common side effects may include:
Rare but serious side effects may include heart rhythm disturbances or severe increase in blood pressure.
EXCELLENT Based on 121 reviews Posted on Hema Mehta06/09/2024 Very friendly and helpful. Moved my order to urgent as was needed in a certsin timeframe. So grateful for their help and service.Posted on Uju Udedibia30/08/2024 Great experience and an amazing, receptive and lovely staff. I recommend this pharmacy.Posted on Lindsey Whitaker22/08/2024 I had my blood taken today by the lovely lady at the pharmacy. It was a really great service and so reasonably priced. I will definitely be using their phlebotomy services again.Posted on Joanne Royle22/08/2024 Wonderful service I went for diabetes test after failing to getting sorted with my own doctors. Lady that did my test was fantastic. The staff are friendly and very welcoming. I would recommend them 100%. I will definitely use them again in the futurePosted on Ifeanyi Ohanyere16/08/2024 I visited the pharmacy to do a genotype test. The staff were so kind and supportive as I was coming from out of town. Turn around was quick. I highly recommend.
Page content authored by Amjad Khan, last reviewed by Mr Mohammed on 3rd March 2026.




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