Anaphylaxis is often understood as a single, sudden, severe allergic reaction that resolves once treatment is given. However, in some cases, symptoms return hours after the initial reaction appears to have resolved — a phenomenon known as biphasic anaphylaxis.

Workplace preparedness for allergic emergencies is critical. Severe allergic reactions, or anaphylaxis, can occur without warning. Identifying potential hazards is the first step in creating a safe environment.

Adrenaline auto-injectors are used to treat anaphylaxis, which is a life-threatening allergic reaction that can occur without warning. Delayed access to adrenaline significantly increases the risk of serious harm or death.