Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
1
Is any of this happening now?
Call 911
Call emergency services for:
Difficulty breathing, wheezing, or throat tightness
Swelling of the tongue, lips, mouth, or throat
Fainting, collapse, severe confusion, or inability to wake normally
Severe or ongoing chest pain
Sudden weakness on one side, trouble speaking, or a sudden extreme headache
These are not typical features of mild MSG symptom complex.
They may indicate an allergic reaction, heart problem, stroke, or another emergency.
Other emergency signs, for anyone
Someone who is struggling to breathe, gasping, choking, or cannot get words out
Someone who has chest pain, tightness or pressure lasting more than a few minutes
Someone who has sudden weakness or drooping on one side of the face or body, slurred speech, or sudden confusion
Someone who is unconscious, or cannot be woken
Someone who is bleeding heavily and it will not stop with firm pressure
Someone who has had a seizure that will not stop, or does not wake up afterwards
Someone who has lips or skin that look pale, blue, grey or blotchy
Someone who you believe has taken an overdose or swallowed something poisonous
2
Is any of this happening?
Be seen today
Seek urgent medical advice for persistent vomiting, severe or unusual headache, ongoing palpitations, or chest discomfort that quickly settles but has not been assessed before.
3
Does any of this apply?
Book an appointment
Arrange a routine appointment if:
Symptoms repeatedly follow meals
Headaches, flushing, nausea, or palpitations are frequent
You are avoiding many foods or losing weight without intending to
Symptoms are changing, lasting longer, or interfering with daily life
You need help working out whether MSG or another ingredient is involved
Every sign above is quoted from the sofidex article on MSG symptom complex. If you are not sure, err upward — it is always reasonable to be checked.