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 now if there is:
Trouble breathing, blue or grey lips, or severe choking
Collapse, inability to wake, severe confusion, or unusual behaviour
A seizure
Chest pain, marked palpitations, or sudden severe weakness
New blurred vision or loss of vision
A large exposure in an enclosed space
Lacquer around the mouth of someone who is not fully alert
And for anyone, someone who:
you believe has taken an overdose or swallowed something poisonous
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
2
Is any of this happening?
Be seen today
Call a poison centre promptly after lacquer has been swallowed, after a substantial inhalation in an enclosed space, or when the product or amount is uncertain.
In the United States, Poison Control can be reached at 1-800-222-1222.
Elsewhere, use the local poison information service.
Seek urgent advice after eye exposure if pain, redness, or blurred vision continues after rinsing.
Medical assessment is also appropriate for persistent cough, vomiting, headache, dizziness, skin burns, or worsening symptoms.
The article also says
Do not drive a severely affected person yourself.
Keep them away from fumes and flames while waiting for help.
If they are unconscious but breathing, place them on their side if you can do so safely.
Do not give anything by mouth.
Every sign above is quoted from the sofidex article on Lacquer poisoning. If you are not sure, err upward — it is always reasonable to be checked.