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 the person:
Is unconscious, has collapsed, or cannot be awakened
Has a seizure
Has slow, shallow, or difficult breathing
Vomits blood or passes black, sticky stool
Has severe confusion, extreme drowsiness, or rapidly worsening symptoms
Took the medicine intentionally or may also have taken other substances
Do not leave an affected person alone while emergency help is being arranged.
And for anyone, someone who:
is unconscious, or cannot be woken
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 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
After discharge, seek prompt medical advice for worsening abdominal pain, repeated vomiting, reduced urine, swelling, dizziness, black stool, or blood in vomit.
3
Does any of this apply?
Book an appointment
Routine follow-up may include repeat kidney tests or a blood count when recommended.
And for anyone, someone who:
is having side effects from a medicine, or is struggling to take it as prescribed
The article also says
Get immediate poison advice after any suspected meclofenamate overdose, even if there are no symptoms.
In the United States, call Poison Control at 1-800-222-1222 .
If you are elsewhere, use your local poison information service.
Do not drive yourself if you are very drowsy, faint, confused, or unwell.
Every sign above is quoted from the sofidex article on Meclofenamate overdose. If you are not sure, err upward — it is always reasonable to be checked.