Anaphylaxis: A Life-Threatening Allergic Reaction

Women using Anaphylaxis injection

Anaphylaxis is a severe, potentially life-threatening allergic reaction that occurs rapidly, typically within minutes of exposure to an allergen. It can affect multiple body systems and may cause symptoms like difficulty breathing, a rapid drop in blood pressure, hives, swelling, and gastrointestinal issues. Anaphylaxis requires immediate medical intervention, often treated with an epinephrine injection (like an EpiPen), as it can lead to anaphylactic shock and be fatal if not promptly managed. Recognizing and treating it quickly is crucial for preventing serious outcomes.

Symptoms of anaphylaxis:

  1. Skin Reactions: Hives, itching, or flushed/pale skin.
  2. Swelling: Particularly of the face, lips, tongue, or throat, leading to difficulty swallowing or breathing.
  3. Respiratory Issues: Shortness of breath, wheezing, or tightness in the chest.
  4. Gastrointestinal Problems: Nausea, vomiting, or diarrhoea.
  5. Cardiovascular Symptoms: Rapid or weak pulse, drop in blood pressure, dizziness, or fainting.
  6. Other Symptoms: Anxiety, confusion, or a sense of impending doom.

Immediate treatment with epinephrine is critical if anaphylaxis is suspected.

What Are the Four Stages of Anaphylaxis?

  1. Exposure and Sensitization: Contact with an allergen (e.g., food, insect sting) triggers the immune system.
  2. Early Reaction: Symptoms like itching, hives, and swelling begin, usually within minutes.
  3. Progressive Symptoms: Escalating to breathing difficulties, low blood pressure, and gastrointestinal distress.
  4. Shock Stage: Severe drop in blood pressure, leading to anaphylactic shock. Immediate treatment is crucial at this stage.

Five Most Common Triggers for Anaphylaxis

  1. Foods: Peanuts, tree nuts, shellfish, dairy, and eggs are common triggers.
  2. Insect Stings: Bees, wasps, and other stinging insects can cause severe reactions.
  3. Medications: Antibiotics like penicillin, aspirin, and other drugs may induce anaphylaxis.
  4. Latex: Found in gloves, medical supplies, and certain everyday items.
  5. Exercise: Sometimes, exercise itself or exercise in combination with certain foods can cause anaphylaxis.

How Long Does Anaphylactic Shock Last?

Anaphylactic shock can last anywhere from a few minutes to several hours, depending on how quickly it's treated. Without prompt medical attention, anaphylaxis can be life-threatening. Epinephrine (administered via an auto-injector like an EpiPen) is the primary treatment and should be given immediately when symptoms appear.

Can You Sleep Through Anaphylaxis?

No, you should never try to "sleep through" anaphylaxis. Symptoms can worsen rapidly, leading to unconsciousness or shock. If any signs of anaphylaxis occur, seek emergency medical assistance right away and use an epinephrine injector if available.

Understanding and identifying the symptoms of anaphylaxis early can save lives. If you or a loved one is at risk, proper allergy testing and preventive care are essential.

At our clinic, we offer Alex2 Allergy Testing to help identify your specific triggers, providing you with the knowledge to manage and avoid severe reactions. Take control of your health today—schedule an allergy test and get the answers you need.

Click here to schedule your allergy test. 

Same Day Online Booking

Book your consultation online with our easy online booking form.

No Time Limits Appointments

Confidential same-day GP consultations with no time limits. Discuss your health concerns with an experienced doctor in a private and relaxing space.

Online Consultations Available

Same-day GP telephone or video consultations provide instant access to doctors. Prescriptions, medical certificates, referral letters & sick notes are available.

Dr Ibrahim Mutlib

Dr. Ibrahim Mutlib (BMBS, BMedSci) is an experienced GP with specialist interests in mental health, gastrointestinal health, and respiratory medicine. A clinical leader and published author, he is passionate about innovative, patient-centred care that supports both physical and emotional wellbeing.

Ready to take the next step?

Whether you're seeking advice or ready to book a consultation, we’re here to help. Explore our services or connect with a care professional today.

Latest blog posts

Ibuprofen tablets
News

NHS Warning Issued to Anyone Taking Naproxen and Aspirin Alongside Ibuprofen

The NHS has issued an important warning for people who use common painkillers, advising the public not to mix ibuprofen with other nonsteroidal anti-inflammatory drugs (NSAIDs) such as naproxen or aspirin.
School closures as NHS pressures grow
News

FLU-NAMI: Mutated ‘Superflu’ Strain Forces School Closures as NHS Pressures Grow

A newly emerging strain of influenza, widely referred to as the “superflu”, is rapidly spreading across the UK and causing significant disruption to schools, families, communities, and healthcare services.
Doctor talking to senior patient at home
Private GP

Your Guide to GP Home Visits in Sutton Coldfield

If you're feeling unwell but the thought of getting to a clinic fills you with dread, you're not alone.
Small red itchy bumps on the skin caused by scabies
Health

Scabies: Causes, Symptoms, Treatment & How to Prevent the Spread

Scabies is a highly contagious skin condition caused by the microscopic Sarcoptes scabiei mite. These mites burrow into the skin, leading to intense itching, irritation, and a distinctive rash.
Elderly couple shopping
News

Christmas Shopping May Expose These Two Hidden Dementia Signs, Doctors Caution

Families are being urged to stay alert during festive shopping trips this year, as specialists highlight two early dementia warning signs that often become more noticeable in crowded, fast-paced environments.
Vitamin D rich foods
Nutrition

The Health Benefits of Vitamin D Injections – A Complete Guide

Vitamin D is a crucial nutrient that plays a pivotal role in maintaining long-term health and overall wellbeing. From supporting a strong immune system to strengthening bones and improving mood.