Histamine
The primary allergen is a protein called Fel d 1 that is produced by cat saliva and sebaceous glands, which causes either an allergic or asthmatic response.
Mast cells are the connective tissue cells that produce histamine in response to various stimuli, such as allergens or injury. Histamine is a key mediator of inflammation and allergic responses in the body.
Any drug can provoke allergic response. Every one is unique and different. So some individuals give individual response to the given drug. All the drugs can give allergic response in some individuals. Some drugs are more prone to give allergic response. No drug is designed to give an allergic response. It will not be called as drug in that case.
Neutrophils are generally not the primary immune cells involved in allergic responses; instead, eosinophils and mast cells play a more significant role. During an allergic reaction, the body produces IgE antibodies that trigger the release of histamine and other mediators, which primarily attract eosinophils. However, in certain cases of allergic reactions, such as those with secondary infections or inflammation, neutrophils may be elevated, but this is not typical of the classic allergic response.
Allergic Response
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It's general biochemical name is an Antigen - anti = against and gen = genesis.
an allergic reaction
Hypersensitivity is also known as allergic reaction, exaggerated immune response, or allergic sensitivity.
Hives are a common allergic response yes.
anaphylactic shock
Yes, allergic reactions can sometimes cause a fever as part of the body's immune response to the allergen.