Test mode — use card 4242 4242 4242 4242, any future expiry, any CVC. No real charges.
⚠️
seriousMedical

Allergic reaction

Most allergic reactions are manageable and pass. Knowing these signs means you'll always know exactly what to do next.
Serious — call 911 if in doubt

For children:

  • Step 3For mild reactions — antihistamine: Children's liquid antihistamine is weight-dosed — check packaging or call a pharmacist for the correct dose by weight.
Steps

5 steps

  1. 1

    Identify: mild, moderate, or severe?

    Mild: hives, itching, runny nose, watery eyes. Moderate: vomiting, cramps, swelling. Severe (anaphylaxis): throat tightness, difficulty breathing, hoarse voice, rapid heartbeat, dizziness, pale or bluish skin.

    Important: Anaphylaxis is life-threatening and moves fast. Use epinephrine (EpiPen) and call 911 immediately. Do not wait to see if it improves.
  2. 2

    Remove the trigger if safe

    Remove the allergen if possible — bee sting: scrape sideways with a card, don't squeeze. Food: stop giving it. Move away from the environment if needed.

  3. 3

    For mild reactions — antihistamine

    Give oral antihistamine: diphenhydramine (Benadryl) or cetirizine (Zyrtec). Monitor closely for 1 to 2 hours for any signs of worsening.

  4. 4

    For severe reaction — use the EpiPen

    Hold EpiPen firmly. Press the tip hard against the outer thigh (through clothing is fine). Hold 10 seconds. Remove and massage 10 seconds. Call 911 even if they improve immediately.

    Tip: Note the exact time you gave the injection and tell paramedics when they arrive.
  5. 5

    Monitor for biphasic reaction

    Position: conscious — sit upright. Shock signs (pale, weak pulse) — lie flat, raise legs. Unconscious — recovery position on side.

    Important: Always go to the ER for any anaphylaxis. A second wave of reaction (biphasic) can occur 4 to 8 hours later — this is well documented and dangerous.
Kit

What you'll need

  • Antihistamine (Benadryl or Zyrtec)
  • EpiPen if prescribed
  • Phone for 911
Related

Medical

Guidance only — in any emergency, call 911.