Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Elsewhere, use your local poison-information service or emergency medical service.
Call emergency services now for:
And for anyone, someone who:
Contact a poison centre promptly after any suspected swallowing of a naphthalene mothball or other naphthalene product.
Do not wait for symptoms.
In the United States, Poison Help is available at 1-800-222-1222 .
Seek urgent medical assessment after exposure if there is vomiting, worsening headache, unusual tiredness, pale or yellow skin, dark urine, shortness of breath, or reduced urine output.
However, new blue-grey colouring, breathing difficulty, fainting, rapidly worsening weakness, or very little urine should not wait for a routine appointment.
After treatment, keep routine follow-up appointments and complete recommended blood or urine tests.
Every sign above is quoted from the sofidex article on Naphthalene poisoning. If you are not sure, err upward — it is always reasonable to be checked.