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
Elsewhere, contact your local poison centre or emergency medical service.
Have the medicine container available, but do not delay the call while searching for it.
Call emergency services immediately if the person:
Has a seizure
Is difficult to wake or loses consciousness
Has trouble breathing
Is severely confused, aggressive, or hallucinating
Has a very fast or irregular heartbeat
Feels extremely hot or has hot, dry skin
Collapses or cannot stand safely
May have taken cyproheptadine deliberately
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
Treat any suspected cyproheptadine overdose as urgent, even if the person currently feels well.
After hospital discharge, seek urgent reassessment for worsening confusion, fainting, breathing difficulty, persistent vomiting, inability to urinate, severe muscle pain, or dark urine.
Routine follow-up is appropriate for medication review or storage planning when no urgent symptoms are present.
3
Does any of this apply?
Book an appointment
And for anyone, someone who:
is having side effects from a medicine, or is struggling to take it as prescribed
The article also says
In the United States, call Poison Help at 1-800-222-1222 .
Do not leave an unconscious or severely confused person alone.
If they are unconscious but breathing, place them on their side if you can do so safely.
Do not put anything in their mouth during a seizure.
Every sign above is quoted from the sofidex article on Cyproheptadine overdose. If you are not sure, err upward — it is always reasonable to be checked.