Anaphylaxis, also called anaphylactic shock, is an acute, life-threatening allergic reaction. The reaction affects different organs in the body, one or several at a time. Even if the initial symptoms are experienced mildly, there is a risk that they may rapidly turn into a serious and severe condition. Anaphylaxis can occur immediately or within minutes, depending on the route of exposure, and can worsen quickly.   

Common anaphylaxis symptoms can include:

• A sudden drop in blood pressure;
• Abdominal pain;
• Hives;
• Nausea and vomiting;
• Shortness of breath;
• Swelling around the eyes and the mouth;
• Tingling and itching around the mouth;
• Weak and rapid pulse.