What is the correct initial action when an autoinjector is used for suspected anaphylaxis in the dental clinic?

• A. Inject epinephrine IM into the mid-outer thigh as directed and call EMS.
• B. Inject epinephrine IM into the deltoid and delay calling EMS.
• C. Use the autoinjector in the deltoid and reuse if symptoms persist.
• D. Give an oral antihistamine and wait to see if symptoms subside.

Answer: (A)

When suspected anaphylaxis occurs in a dental setting, the immediate priority is to deliver epinephrine, the first-line treatment that acts quickly to reverse airway swelling, low blood pressure, and other severe symptoms. Using the autoinjector into the mid-outer thigh is the preferred route because this site provides the fastest, most reliable absorption, which is crucial in a rapidly evolving reaction. After delivering the dose, you should summon emergency medical services right away and arrange prompt transfer to a higher level of care. While waiting for help, continue to monitor the patient and keep them in a safe position, ready to support breathing and airway if needed. Do not rely on oral antihistamines or delay treatment to see if symptoms subside, and avoid injecting into the deltoid or reusing a device not indicated for reuse; additional doses may be needed only if advised by emergency responders or medical professionals.