anaphylaxis
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Key facts
- Medical condition.name
- Anaphylaxis
- Medical condition.types
- Anaphylactoid reaction, anaphylactic shock, biphasic anaphylaxis
- Medical condition.field
- Emergency medicine, allergy and immunology
- Medical condition.symptoms
- Itchy rash, throat swelling, numbness, shortness of breath, lightheadedness, low blood pressure, vomiting
- Medical condition.onset
- Over minutes to hours
- Medical condition.causes
- Insect bites, foods, medications, drugs/vaccines
- Medical condition.diagnosis
- Based on symptoms
- Medical condition.differential
- Allergic reaction, asthma exacerbation, carcinoid syndrome
- Medical condition.treatment
- Epinephrine, intravenous fluids
- Medical condition.medication
- Epinephrine, corticosteroids, antihistamines
- Medical condition.frequency
Article
31 sectionsContents
- Etymology
- Signs and symptoms
- Skin
- Respiratory
- Cardiovascular
- Other
- Causes
- Food and alcohol
- Medication
- Venom
- Risk factors
- Pathophysiology
- Immunologic
- Non-immunologic
- Mixed type
- Diagnosis
- Classification
- Allergy skin testing
- Differential diagnosis
- Post-mortem findings
- Prevention
- Management
- Epinephrine
- Adjuncts
- Preparedness
- Prognosis
- Epidemiology
- History
- Research
- References
- External links
Anaphylaxis is a serious, potentially fatal allergic reaction that can progress rapidly. It typically causes more than one of the following: an itchy rash, throat closing due to swelling that can obstruct or stop breathing; severe tongue swelling that can also interfere with or stop breathing; shortness of breath, vomiting, lightheadedness, loss of consciousness, low blood pressure, and medical shock.
These symptoms typically start in minutes to hours and then increase very rapidly to life-threatening levels. Urgent medical treatment is required to prevent serious harm and death, even if the patient has used an epinephrine autoinjector or has taken other medications in response, and even if symptoms appear to be improving.