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Anaphylactoid reaction, non-immune anaphylaxis, or pseudoanaphylaxis, is a type of anaphylaxis that does not involve an allergic reaction but is due to direct mast cell degranulation. [ 10 ] [ 42 ] Non-immune anaphylaxis is the current term, as of 2018, used by the World Allergy Organization [ 42 ] with some recommending that the old ...
A drug allergy is an allergy to a drug, most commonly a medication, and is a form of adverse drug reaction. Medical attention should be sought immediately if an allergic reaction is suspected. An allergic reaction will not occur on the first exposure to a substance.
Pseudoallergy, sometimes known as nonallergic hypersensitivity, is a type of hypersensitivity reaction mostly described in the context of drug allergy.The mechanism is somewhat similar to the type 1 hypersensitivity in the Gell and Coombs classification in that the effector cell is also mast cell.
Mast cell activation syndrome (MCAS) is a term referring to one of two types of mast cell activation disorder (MCAD); the other type is idiopathic MCAD. [1] MCAS is an immunological condition in which mast cells, a type of white blood cell, inappropriately and excessively release chemical mediators, such as histamine, resulting in a range of chronic symptoms, sometimes including anaphylaxis or ...
Typical treatments for anaphylaxis and allergic reactions, such as epinephrine, corticosteroids, and antihistamines, are often used in acute cases of AAE with variable resolution. [4] C1-INH concentrates are available in intravenous (IV) and intramuscular (IM) methods of delivery. [ 4 ]
The classification organizes the hypersensitivity reactions to NSAIDs into the following five categories: NSAIDs-exacerbated respiratory disease (NERD) is an acute (immediate to several hours) exacerbation of bronchoconstriction and other symptoms of asthma in individuals with a history of asthma and/or nasal congestion, rhinorrhea or other symptoms of rhinitis and sinusitis in individuals ...
Anaphylaxis is a potential life-threatening reaction to the allergy There have been cases where gastrointestinal symptoms arise without pruritus, hives, or other skin involvement. This presentation is not typical of food allergies, which can make initial suspicion of alpha-gal syndrome less likely. [ 8 ]
Mosquito bite allergies are informally classified as 1) the skeeter syndrome, i.e., severe local skin reactions sometimes associated with low-grade fever; 2) systemic reactions that range from high-grade fever, lymphadenopathy, abdominal pain, and/or diarrhea to, very rarely, life-threatening symptoms of anaphylaxis; and 3) severe and often ...