Carcinoid crisis can occur when NET patients are given anesthetics, e.g. for surgery. This can be fatal and medical staff need to be aware of this possibility when dealing with a NET patient.
In urgent or emergency circumstances, it can be beneficial for NET patients to have an identifier on their person which identifies them as a NET patient who may require Octreotide infusions.
Here is a pre-worded Carcinoid Crisis Card in PDF form, that you can print at home and carry with you at all times.