What should you know about anaphylaxis cdc?

Do not wait for every possible sign to appear. If a person has a prescribed epinephrine auto-injector and anaphylaxis is suspected, use it according to their emergency plan, then call local emergency services.

The reaction can involve several body systems within a short period. Features may include hives or flushing, swelling of the lips or tongue, throat tightness, wheezing, repeated vomiting, dizziness, faintness or collapse. Skin changes can be absent, so clear skin does not rule it out.

Food, medicines and insect stings are among the possible triggers. A reaction may begin after exposure to something previously tolerated, and its course can be unpredictable.

Give epinephrine into the outer thigh without delaying for an antihistamine. Antihistamines may ease itching or hives, but they do not treat dangerous airway swelling or low blood pressure. Note the time of the injection and follow the device instructions and personal action plan.

Call local emergency services even if the person improves. Keep them lying down with legs raised if tolerated; if breathing is difficult, they may need to sit with legs extended. Place an unconscious breathing person on their side, and do not let them stand or walk suddenly.

Treat throat tightness, trouble breathing, wheezing, tongue swelling, faintness, confusion or collapse after a possible allergen exposure as an emergency. A combination of symptoms in different body areas, such as hives with vomiting or dizziness, also warrants immediate action.

Medical observation is needed because symptoms can return after apparent improvement. If symptoms persist or recur, emergency clinicians may advise another epinephrine dose according to the person’s plan and the product directions.

After recovery, ask what trigger is suspected, whether allergy testing is appropriate, how to avoid accidental exposure, and when to replace or carry epinephrine devices. Request a written emergency plan and practise the correct injection technique with a trainer device.