What is the recommended IV fluid choice in cases of anaphylaxis?

In cases of anaphylaxis, normal saline is the recommended intravenous fluid choice primarily due to its availability and effectiveness in quickly expanding blood volume. Anaphylaxis is characterized by severe vasodilation and increased capillary permeability, leading to significant fluid shifts and cardiovascular instability. Administering normal saline helps to restore intravascular volume and improve circulation, which is critical during anaphylactic shock. Normal saline is isotonic, making it suitable for rapid volume resuscitation, especially in acute scenarios where blood pressure support is urgently needed.

While other fluids such as Ringer's lactate may have indications in other clinical situations, they are not the first-line choice during anaphylaxis. Dextrose solutions are not appropriate in this acute setting as they do not provide the necessary immediate volume expansion or electrolyte balance. Colloids, though they can also be used for volume resuscitation, are typically reserved for specific conditions and are not routinely recommended for initial management of anaphylaxis. Thus, normal saline stands out as the most effective and practical choice in the acute management of this life-threatening emergency.