Adrenaline auto-injectors are designed for easy access and use with simple instructions
Anaphylaxis is a life threatening allergic reaction. It can occur within minutes of exposure to a trigger substance.
The first line of treatment for an anaphylactic reaction is the injection of adrenaline using an epinephrine auto-injector such as an EpiPen or AnaPen.
How does an adrenaline auto-injector work?
EpiPen and AnaPen contain the active ingredient adrenaline, also referred to as epinephrine. Adrenaline is a hormone produced naturally by the adrenal glands in the body in times of stress. This prepares the body for extra energy exertion to allow the body to more readily handle life threatening situations.
When someone has an anaphylactic reaction they may encounter the following symptoms:
Tightness of the throat from swelling
Difficulty breathing
Tongue & facial swelling
Hoarse voice or difficulty speaking
A wheeze or persistent cough
Collapse or falling unconscious
Becoming pale or floppy (young children)
Abdominal pain & vomiting
Hives, welts & body redness
The adrenaline administered through an auto-injector works to reverse these symptoms by acting on alpha and beta adrenergic receptors in the body.
The alpha receptors are located on the walls of blood vessels. By stimulating these receptors, adrenaline causes the blood vessels to narrow and stops blood pressure from falling too low. This process also redirects blood to vital organs.
Adrenaline also acts on beta receptors, which are found in the heart and lungs. By opening and relaxing the airways, this makes it easier to breathe. It also helps reverse throat tightness, hives, itching and skin swelling.
How do I use an adrenaline auto-injector?
Adrenaline should be administered as soon as possible to a person going into anaphylactic shock.
An auto-injector is designed for this but it’s an emergency treatment only. Anyone experiencing anaphylactic symptoms, should also seek receive further treatment from a medical professional.
An EpiPen or AnaPen auto-injector comes pre-filled with epinephrine which will automatically inject when the device is pushed firmly against skin.
The auto-injector should be pushed against the outer-mid thigh, NOT injected into veins, fingers, toes, hands or feet.
When using an auto-injector, follow the instructions that come with it, or follow the advice of your doctor. It should be used at the first signs of a serious allergic reaction.
People who are susceptible to anaphylactic reactions should always carry an auto-injector with them, so it can be used immediately.
See the chart below for instructions on how to use an auto-injector.
Recommended First Aid Treatment for Anaphylaxis
First aid for anaphylaxis
If a person’s symptoms and signs suggest anaphylaxis you should follow their Anaphylaxis Action Plan or take the following steps:
Lay victim flat, do not stand or walk, if breathing is difficult, allow to sit
Prevent further exposure to the triggering agent if possible
Administer adrenaline through auto-injector:
Child less than 5 years – 0.15 mg intramuscular injection.
Older than 5 years – 0.3mg intramuscular injection
Call an ambulance
Administer oxygen and / or asthma medication for respiratory symptoms
Further adrenaline should be given if no response after 5 minutes
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