Type I Hypersensitivity

An IgE-mediated immediate hypersensitivity reaction, characterized by contact urticaria (hives), angioedema, rhinitis, respiratory complications, drop in blood pressure and rapid heart rate that may potentially progress to anaphylaxis. Severe cases may be fatal. Examples include Type I allergies to the proteins in peanuts, penicillin, shell fish, natural rubber latex, etc. Symptoms appear within minutes to an hour.