<unk>  or pseudoallergic reaction is defined as a condition presenting with symptoms similar to an allergic reaction but without detectable immunological sensitization, as found in classical allergic reactions. It is characterized by elevated IgE levels in the blood.
Anaphylactoid reaction
Herxheimer reaction
Cholinergic urticaria
Anaphylaxis
DRESS syndrome
Allergy
Dermatographic urticaria
Injection site reaction