Key Takeaways
- Anaphylaxis is a sudden, life-threatening allergic reaction that demands immediate first aid emergency treatment — every second counts.
- Adrenaline (epinephrine) administered via an EpiPen is the only effective first-line treatment for anaphylaxis. Antihistamines will not stop anaphylactic shock.
- Always call Triple Zero (000) after administering adrenaline, even when symptoms appear to subside.
- A current ASCIA Action Plan for Anaphylaxis and two EpiPens should be carried by every person at risk.
- Sydney residents have access to world-class emergency departments, allergy specialists, and nationally recognised first aid training to help them prepare.
Understanding Anaphylaxis and Why Emergency Treatment Cannot Wait
Anaphylaxis is a severe, life-threatening allergic reaction that requires urgent emergency treatment within minutes of onset. It is triggered by allergen exposure and can affect multiple body systems simultaneously — causing airway swelling, cardiovascular collapse, and respiratory failure if not treated immediately with adrenaline. The Australasian Society of Clinical Immunology and Allergy (ASCIA) reports that Australia and New Zealand have among the highest rates of allergic conditions in the developed world, with anaphylaxis cases presenting to emergency departments across the country every day.
In New South Wales, the incidence of severe allergic reaction and anaphylaxis has increased significantly over the past two decades, particularly among children. Sydney’s emergency departments — including those at Royal North Shore Hospital, Sydney Children’s Hospital at Randwick, and St Vincent’s Hospital — manage anaphylactic reactions regularly. For the general public, first aid knowledge is one of the most powerful tools available to reduce the risk of a fatal outcome before emergency services arrive.
Start your preparation today. First Aid Pro Sydney offers nationally recognised first aid courses that include hands-on EpiPen training and comprehensive emergency management. Enrol now and gain the practical skills to act confidently in a health crisis.
What Causes Anaphylaxis? Identifying Allergic Triggers in the Sydney Context
Anaphylaxis occurs when the immune system mounts an extreme, systemic response to a perceived threat. On first contact with an allergen, the body produces immunoglobulin E (IgE) antibodies. On subsequent allergen exposure, these antibodies signal the rapid release of histamine and other inflammatory chemicals, producing the life-threatening histamine reaction that defines anaphylactic shock.
Understanding your allergic triggers is a foundational part of anaphylaxis management and long-term emergency planning.
Common allergens responsible for anaphylaxis in Australia:
Allergen Category | Common Examples |
Foods | Peanuts, tree nuts, cow’s milk, egg, wheat, sesame, fish, shellfish |
Insect stings | Bee and wasp stings (common in Sydney’s suburban and bushland areas) |
Medications | Penicillin, aspirin, ibuprofen, anaesthetic agents, contrast dyes |
Latex | Medical and dental gloves, balloons, certain elastic products |
Exercise | Exercise-induced anaphylaxis, sometimes linked to food intake beforehand |
Food allergies remain the leading cause of anaphylaxis in Australian children, while insect stings and medication allergies are more common triggers among adults. In Sydney’s multicultural food landscape — with its abundance of restaurants, food markets, and catered events — the risk of accidental allergen exposure is a daily reality for those with severe food allergies.
It is important to understand the difference between mild to moderate allergic reactions — such as skin symptoms, allergic rhinitis, or gastrointestinal symptoms — and a true anaphylactic reaction. Symptoms may initially present as mild and worsen without warning. This unpredictability is precisely why a written first aid plan and immediate access to adrenaline are non-negotiable.
Recognising Anaphylaxis: First Aid Starts With Knowing What to Look For
Prompt recognition of anaphylaxis is a critical first aid skill. An allergic reaction may progress to anaphylaxis within minutes of allergen exposure, though in some cases anaphylaxis may be delayed by up to 30 minutes or longer. The diagnosis of anaphylaxis is based on the involvement of multiple body systems following known or suspected allergen contact.
Symptom Progression: From Allergic Reaction to Anaphylactic Emergency
The relationship between asthma and anaphylaxis deserves particular attention. Asthma and anaphylaxis share overlapping respiratory symptoms, including wheeze and breathing difficulty. Individuals with poorly controlled asthma face a significantly elevated risk of fatal anaphylaxis. In the context of known allergen exposure, respiratory symptoms that do not respond to an asthma reliever inhaler should be treated as anaphylaxis immediately — do not wait for confirmation.
The guiding principle in first aid emergency response: When in doubt, treat for anaphylaxis.
The ASCIA Action Plan for Anaphylaxis: Your Personalised Emergency Response Plan
The ASCIA Action Plan is the nationally recognised emergency response blueprint for individuals at risk of anaphylaxis. Developed by the Australasian Society of Clinical Immunology and Allergy, it is available free on the ASCIA website and must be completed and signed by a qualified health professional.
A current ASCIA Action Plan for anaphylaxis includes:
- A photograph of the individual
- A confirmed list of allergens
- Prescribed adrenaline dosing based on the individual’s weight
- Clear, stepwise first aid management of anaphylaxis instructions
- Guidance on when to administer adrenaline and when to call 000
- Emergency contact details
Separate ASCIA Action Plans exist for anaphylaxis and for asthma management. Many children in Sydney schools and childcare centres require both. In New South Wales, childcare and education facilities are legally required to hold a current ASCIA Action Plan alongside each child’s prescribed EpiPen. These plans should be reviewed annually and updated whenever a child’s condition, medication, or weight changes.
Comprehensive information about ASCIA Action Plans — including downloadable templates — is available at ascia.org.au. Every carer, educator, and family member of someone at risk should know how to read and act on this plan.
Emergency First Aid Treatment of Anaphylaxis: Step-by-Step Protocol
First Aid Management of Anaphylaxis: The ASCIA Emergency Steps
The following protocol aligns with ASCIA first aid guidelines and is consistent with recommendations from the National Allergy Council, the Department of Health, and registered training organisations across Australia and New Zealand.
Anaphylaxis First Aid Action Steps
Confirm signs of anaphylaxis across multiple body systems:
skin, airway, respiratory, cardiovascular
Lay them flat. If breathing is laboured, allow them to sit up.
Do not allow them to stand, walk, or move unnecessarily.
Inject the EpiPen firmly into the outer mid-thigh.
Remove clothing if possible. Hold for 10 seconds. Note the time.
Inform the operator that the person is having anaphylaxis.
Emergency services must attend regardless of apparent recovery.
If there is no improvement after 5 minutes, administer
a second dose of adrenaline if a second autoinjector is available.
If the person becomes unresponsive and is not breathing normally,
commence CPR and continue until the paramedic arrives.
Correct EpiPen Administration: What Every First Aider Must Know
The EpiPen is the most widely prescribed epinephrine autoinjector available in Australia. Correct administration of adrenaline in the first minutes of an anaphylactic reaction is the single most life-saving intervention available before a paramedic arrives. Critically, antihistamines have no role in the emergency treatment of anaphylaxis — they act far too slowly and do not address airway swelling, respiratory collapse, or cardiovascular failure.
EpiPen Device | Adrenaline Dose | Recommended For |
EpiPen Jr (0.15 mg) | 0.15 mg epinephrine | Children approximately 10–20 kg |
EpiPen (0.30 mg) | 0.30 mg epinephrine | Adults and children over 20 kg |
Administration of adrenaline into the outer mid-thigh — the recommended injection site — allows rapid absorption into muscle tissue. The EpiPen can be administered through light clothing. After use, the exposed needle tip must be handled carefully. Hand the used device to the paramedic on arrival to assist with clinical handover.
Biphasic reactions — a recurrence of anaphylaxis symptoms hours after the initial episode — affect a proportion of anaphylaxis cases. Even after apparent recovery, emergency department observation is essential. This is a non-negotiable aspect of safe post-event management of anaphylaxis.
Asthma and Anaphylaxis: Managing Overlapping Emergencies
For many Sydneysiders, asthma and anaphylaxis coexist as concurrent medical conditions — and the overlap between them can complicate emergency response. Poorly managed asthma is one of the most significant risk factors for fatal anaphylaxis, making asthma management an integral component of any comprehensive anaphylaxis emergency response plan.
During an anaphylactic reaction, acute asthma symptoms — including wheeze, chest tightness, and laboured breathing — may emerge alongside or in place of other classic signs. The ASCIA Action Plan specifically addresses asthma and anaphylaxis together for individuals with both conditions, providing clear decision points for caregivers and first aiders.
If a person with known food allergies or other allergen sensitivities experiences sudden respiratory symptoms — and their reliever inhaler is not providing relief — treat for anaphylaxis without delay. Administer adrenaline via EpiPen and call 000 immediately.
Accessing Urgent Medical Care for Anaphylaxis in Sydney
Sydney Emergency Departments and Allergy Services
Facility | Type | Location |
Royal North Shore Hospital | Major adult emergency department | St Leonards |
Sydney Children’s Hospital, Randwick | Paediatric emergency department | Randwick |
Westmead Hospital | Major adult and paediatric emergency | Westmead |
St Vincent’s Hospital Sydney | Emergency and specialist services | Darlinghurst |
The Children’s Hospital at Westmead | Paediatric emergency department | Westmead |
Following emergency treatment of anaphylaxis, a minimum four-hour observation period in a hospital emergency department is standard practice. Where a biphasic reaction is considered likely — based on the severity of the initial episode or the allergen involved — observation may extend to six to eight hours. Patients should never self-discharge early, even when feeling fully recovered.
After discharge, a referral to an allergy and clinical immunology specialist is strongly advisable. Allergy and clinical immunology services in Sydney can confirm the diagnosis of anaphylaxis through formal testing, identify specific allergens, assess the ongoing risk of anaphylaxis, and develop a tailored long-term first aid plan. Public referral pathways are available through NSW Health, and private clinical immunology and allergy clinics operate across the greater Sydney metropolitan area.
Build your skills before you need them. First Aid Pro’s Sydney first aid courses cover anaphylaxis emergency treatment, EpiPen administration, and CPR resuscitation — delivered by qualified instructors in a hands-on environment. Enrol with First Aid Pro Sydney today.
Long-Term Anaphylaxis Management: Practical Steps for Sydney Residents
Preparing for an Anaphylactic Emergency Before It Happens
Effective long-term management of anaphylactic reactions requires a proactive, structured approach. The following steps reflect best practice guidance from ASCIA, the National Allergy Council, and the Department of Health.
- Confirm your allergens through clinical testing A formal allergy and clinical immunology assessment — including skin prick testing or specific IgE blood testing — identifies your precise triggers and informs your emergency response plan.
- Obtain and maintain a current ASCIA Action Plan for Anaphylaxis Your ASCIA Action Plan should be reviewed and re-signed by a health professional at least once a year. Ensure it is accessible to all caregivers, teachers, and workplace contacts.
- Carry two EpiPens at all times Two autoinjectors are the standard recommendation. A second dose of adrenaline may be necessary if the paramedic has not yet arrived, or in the event of device failure.
- Store your EpiPen correctly in Sydney’s climate Adrenaline autoinjectors must be stored between 15°C and 25°C, away from direct sunlight and heat sources. Never leave an EpiPen in a parked car — temperatures inside vehicles in Sydney’s summer can exceed 60°C, rendering the medication ineffective.
- Manage allergen exposure proactively Australian food labelling laws require mandatory declaration of the 14 priority allergens on packaged food products. When dining at Sydney restaurants or catered events, communicate your allergen clearly at the time of ordering — not as an afterthought.
- Wear or carry medical alert identification Medical alert bracelets, wallet cards, or digital apps provide emergency services and bystanders with critical allergy information if you are unable to communicate during a reaction.
- Discuss immunotherapy with your allergist For selected allergens, including bee venom and certain foods, allergen immunotherapy delivered through clinical immunology services may reduce sensitivity and lower the long-term risk of anaphylaxis.
Knowledge Test: How Well Do You Know Anaphylaxis Emergency Response?
Test your understanding with this short quiz. Answers appear below.
Your qualification could save a life. First Aid Pro’s Sydney courses deliver nationally recognised certification covering anaphylaxis emergency treatment, hands-on EpiPen training, CPR, and airway management. — all in a practical, supportive learning environment. Find your nearest Sydney course and enrol with First Aid Pro today.
References
- Australasian Society of Clinical Immunology and Allergy (ASCIA). ASCIA Action Plan and First Aid PLan for Anaphylaxis. Available at: ascia.org.au
- National Allergy Council Australia. Anaphylaxis Resources
- Children’s Health Queensland: Allergy and anaphylaxis – Emergency management in children
- ASCIA: Guidelines – Acute Management of Anaphylaxis
- Resuscitation Council of Australia and New Zealand. Anaphylaxis Flowchart / Algorithm.
Frequently Asked Questions
What is the difference between a severe allergic reaction and anaphylaxis?
A severe allergic reaction involves significant symptoms — such as widespread hives, facial swelling, or vomiting — but remains localised to one or two body systems. Anaphylaxis involves a rapid, systemic response affecting multiple body systems simultaneously, typically including the airway, cardiovascular system, and skin. The distinction matters because anaphylaxis requires immediate adrenaline and emergency services, whereas a severe but non-anaphylactic reaction may be managed with antihistamines and medical review. If there is any uncertainty, always treat for anaphylaxis.
My child has food allergies and asthma — what should their Sydney school have in place?
NSW schools are required to hold a current ASCIA Action Plan for each child with a diagnosed allergy or asthma risk. For children with both conditions, two separate plans are needed — one for anaphylaxis management and one for asthma management. The school must also store the child’s prescribed EpiPen and reliever inhaler in an accessible location and ensure that staff are trained through a registered training organisation in their correct use. Parents should ensure plans are updated annually and that the school is informed of any changes to the child’s condition or prescribed medications.
Can I rely on ASCIA's free online e-training instead of attending an in-person first aid course?
ASCIA’s free anaphylaxis e-training is an excellent educational resource, particularly for teachers, childcare workers, and carers who need a foundational understanding of anaphylaxis recognition and the ASCIA Action Plan. However, it does not confer a nationally recognised qualification, and it does not include the hands-on EpiPen training and practical resuscitation skills developed in an accredited in-person course. For those in roles with a legal first aid requirement — including childcare workers across NSW — completing a course with a registered training organisation such as First Aid Pro is essential.
How should I store my EpiPen safely during a Sydney summer?
Adrenaline autoinjectors should be stored at room temperature, between 15°C and 25°C, and protected from direct sunlight. Sydney summers regularly produce extreme heat, and temperatures inside parked vehicles can reach dangerous levels within minutes. Never leave an EpiPen in a car, beach bag in direct sun, or any location where it may be exposed to heat. An insulated carry case is recommended for outdoor activities. Check the expiry date every three months and replace the device before it expires.
After using an EpiPen, does the person still need to go to hospital if they feel fine?
Yes — without exception. Even when symptoms appear to resolve completely following adrenaline administration, a hospital emergency department visit is mandatory. Biphasic reactions can cause anaphylaxis symptoms to return hours after the initial episode, sometimes with equal or greater severity. Emergency department observation — typically for a minimum of four hours — allows clinicians to monitor for biphasic reactions, provide additional treatment if required, and arrange appropriate follow-up care including referral to an allergy and clinical immunology specialist.
