Anaphylaxis symptoms
Within 20 minutes to a few hours, anaphylaxis symptoms appear. Symptoms may differ from patient to patient. Symptomatology also varies depending on the mode of allergen exposure. Multiple exposures can exacerbate the symptoms of anaphylaxis, which may ultimately result in shock. Shock symptoms are more complex than allergy or anaphylaxis symptoms.
Uniphasic or biphasic onset of symptoms
Most frequently, patients may exhibit a monophasic presentation; anaphylactic symptoms that develop and subside within a few hours. There is no subsequent correlational episode.
In some cases, an initial phase of anaphylactic reactions may be followed by a subsequent episode, even after the initial period has subsided. In addition, it is distinguished by the absence of allergen exposure during the interval phase of normalcy. Variable time elapses between the two episodes. However, a minimum of four to six hours of observation is recommended in this regard.
