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MSDMERCK MANUALConsumer Version
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  2. Immune Disorders/
  3. Allergic Reactions and Other Hypersensitivity Disorders/
Allergic Reactions and Other Hypersensitivity Disorders
  • Overview of Allergic Reactions
    • Causes
    • Symptoms
    • Diagnosis
      • Skin testing
      • Allergen-specific serum IgE tests
      • Provocative testing
    • Prevention
      • Environmental measures
      • Allergen immunotherapy (desensitization)
    • Treatment
      • Antihistamines
      • Mast cell stabilizers
      • Corticosteroids
      • Other medications
      • Emergency treatment
      • Treatment of allergies during pregnancy and breastfeeding
  • Anaphylactic Reactions
    • Causes
      • Anaphylactoid reactions
    • Symptoms
    • Diagnosis
    • Treatment
    • Prevention
  • Angioedema
    • Acute angioedema
    • Chronic angioedema
    • Symptoms
    • Diagnosis
    • Treatment
      • Emergency treatment
  • Hereditary and Acquired C1 Inhibitor Deficiency
    • Symptoms
    • Diagnosis
    • Treatment
      • Emergency treatment
      • Medications to prevent attacks of angioedema
  • Autoimmune Disorders
    • Causes
    • Symptoms
    • Diagnosis
    • Treatment
      • Medication treatment
      • Plasma exchange and intravenous immune globulin
    • Prognosis
  • Exercise-Induced Allergic Reactions
    • Diagnosis
    • Treatment
  • Food Allergy
    • Other reactions to food
    • Causes
      • Alpha-gal syndrome
      • Oral allergy syndrome
      • Eosinophilic gastroenteropathy
    • Symptoms
    • Diagnosis
    • Treatment
      • Other medications for food allergies
      • Allergen immunotherapy (desensitization)
    • Prevention
  • Mastocytosis
    • Types of mastocytosis
    • Symptoms
    • Diagnosis
    • Treatment
  • Physical Allergy
    • Causes
    • Symptoms
    • Diagnosis
    • Treatment
  • Seasonal Allergies
    • Symptoms
    • Diagnosis
    • Allergy testing
    • Treatment
      • Nasal symptoms
      • Eye symptoms
      • Allergen immunotherapy (desensitization)
  • Year-Round Allergies
    • Symptoms
    • Diagnosis
    • Allergy testing
    • Treatment
      • Eye symptoms
      • Allergen immunotherapy (desensitization)
      • Surgery
    • Prevention
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