auto-injector
noun
au·to-in·ject·or
ˌȯ-tō-in-ˈjek-tər 
variants
or less commonly autoinjector
medical
: a device for injecting oneself with a single, preloaded dose of a drug that typically consists of a spring-loaded syringe activated when the device is pushed firmly against the body
Examples of auto-injector in a Sentence
Recent Examples on the Web
The cost of auto-injectors can range from $100 to $700, according to Nissa Shaffi, director of advocacy at the Allergy & Asthma Network, which supports the bill.
—
David Lightman, Sacbee.com, 24 Sep. 2025
Read More: An Alzheimer’s Blood Test Might Predict Advanced Disease
The self-injectable version works in a similar way to the auto-injector pens that deliver weight-loss drugs like Wegovy and Zepbound, and could make the Alzheimer’s drug accessible to more people.
—Alice Park, Time, 3 Sep. 2025
If someone has ever experienced symptoms beyond swelling, such as breathing issues or widespread hives, Kopelman recommended carrying an epinephrine auto-injector and consulting an allergist about venom immunotherapy.
—Lydia Patrick, MSNBC Newsweek, 22 Aug. 2025
People with a known caffeine allergy who are at risk of anaphylaxis may be prescribed an epinephrine auto-injector (like an EpiPen) to use in case of an emergency.
—Lindsay Curtis, Health, 10 July 2025
For individuals with a history of severe reactions to other types of stings, experts recommend carrying an epinephrine auto-injector.
—Sarah Kuta, Smithsonian Magazine, 10 June 2025
At the moment, managing food allergies mostly comes down to strict avoidance and carrying emergency medication like epinephrine auto-injectors (EpiPens) or antihistamines.
—Jenny Lehmann, Discover Magazine, 15 Apr. 2025
Allergy sufferers can also carry an auto-injector to give themselves an emergency shot in case of a life-threatening case of anaphylaxis.
—Breanne Hayes Haney, The Conversation, 14 Apr. 2025
Examples are automatically compiled from online sources to
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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David Lightman, Sacbee.com, 24 Sep. 2025
Read More: An Alzheimer’s Blood Test Might Predict Advanced Disease
The self-injectable version works in a similar way to the auto-injector pens that deliver weight-loss drugs like Wegovy and Zepbound, and could make the Alzheimer’s drug accessible to more people.
—Alice Park, Time, 3 Sep. 2025
If someone has ever experienced symptoms beyond swelling, such as breathing issues or widespread hives, Kopelman recommended carrying an epinephrine auto-injector and consulting an allergist about venom immunotherapy.
—Lydia Patrick, MSNBC Newsweek, 22 Aug. 2025
People with a known caffeine allergy who are at risk of anaphylaxis may be prescribed an epinephrine auto-injector (like an EpiPen) to use in case of an emergency.
—Lindsay Curtis, Health, 10 July 2025
For individuals with a history of severe reactions to other types of stings, experts recommend carrying an epinephrine auto-injector.
—Sarah Kuta, Smithsonian Magazine, 10 June 2025
At the moment, managing food allergies mostly comes down to strict avoidance and carrying emergency medication like epinephrine auto-injectors (EpiPens) or antihistamines.
—Jenny Lehmann, Discover Magazine, 15 Apr. 2025
Allergy sufferers can also carry an auto-injector to give themselves an emergency shot in case of a life-threatening case of anaphylaxis.
—Breanne Hayes Haney, The Conversation, 14 Apr. 2025
Cite this Entry
“Auto-injector.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/auto-injector. Accessed 31 Oct. 2025.
Copy CitationMedical Definition
auto-injector
noun
au·to-in·ject·or
ˌȯ-(ˌ)tō-ˌin-ˈjek-tər
variants
also autoinjector
: a device for injecting oneself with a single, preloaded dose of a drug that typically consists of a spring-loaded syringe activated when the device is pushed firmly against the body
Some parents and health officials say epinephrine auto-injectors should be as common in schools as defibrillators are, so immediate help would be available to any student suffering anaphylaxis …—Noreen S. Ahmed-Ullah, The Chicago Tribune
Noreen S. Ahmed-Ullah, The Chicago TribuneLove words? Need even more definitions?
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