Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Call emergency services immediately if someone may have taken too much methadone or has slow breathing, cannot be awakened, is making choking or gurgling sounds, or has blue or grey lips.
If the person is not breathing normally, begin CPR or rescue breathing as directed by the emergency dispatcher
Tell emergency responders what was taken and when, if known
After emergency treatment, arrange routine follow-up with the service managing the methadone or with primary care.
Seek earlier medical review for ongoing cough, fever, breathlessness, palpitations, fainting, weakness, memory problems, or unusual confusion.
And for anyone, someone who:
And for anyone, someone who:
The article also says
While waiting for help:
Give naloxone if it is available, following the product instructions
If they are breathing but unconscious, place them on their side
Stay with them and watch their breathing
Give further naloxone if instructed and symptoms return
Do not make the person vomit.
Do not put them in a cold bath, force them to walk, or give coffee.
These actions do not reverse an opioid overdose and may cause harm.
Do not let someone “sleep it off.” Apparent snoring may actually be a sign that their airway is partly blocked.
Every sign above is quoted from the sofidex article on Methadone overdose. If you are not sure, err upward — it is always reasonable to be checked.