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 if there is:
Severe or rapidly worsening difficulty breathing
Blue or grey lips, tongue, or skin
Confusion, extreme drowsiness, collapse, or a seizure
Inability to speak normally because of breathlessness
A serious exposure in an enclosed space
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
Contact a poison information service promptly after swallowing gasoline, kerosene, lamp oil, lighter fluid, paint thinner, or a similar product.
Do this even if there are no immediate symptoms, because advice depends on the product and how the exposure happened.
Seek urgent same-day medical assessment after exposure if there is coughing, choking, vomiting, wheezing, fever, chest pain, or shortness of breath.
Symptoms can develop over several hours.
3
Does any of this apply?
Book an appointment
Arrange routine follow-up if a cough or reduced exercise tolerance does not settle, or if you have repeated pneumonia-like episodes while using mineral oil or another oily product.
The article also says
Do not induce vomiting or give food, drink, or home remedies unless a poison service or healthcare professional directs you to do so.
Every sign above is quoted from the sofidex article on Hydrocarbon pneumonia. If you are not sure, err upward — it is always reasonable to be checked.