Word parts
What it means
Something harmless to most people that the immune system of an allergic person treats as a threat. Common allergens are pollen, dust mites, pet dander, mold, foods such as peanuts and shellfish, insect stings, latex and drugs such as penicillin.
For the nurse
Ask about allergies, and what happened during each reaction, before giving any drug, food or product, and check the allergy band. Keep latex away from clients with a latex allergy.
At a glance
| Spanish | alérgeno |
|---|---|
| Also written | allergens |
Related terms
allergy
A reaction of the immune system to a substance that is harmless to most people.
anaphylaxis
A sudden, severe allergic reaction that affects the whole body.
histamine
A chemical released by certain immune cells that widens blood vessels, makes them leaky and tightens airway muscles.
allergic reaction
A harmful response of the immune system to a substance that is harmless to most people.
antigen
A substance, often a protein on a germ or cell, that the immune system recognizes and responds to.