The plasma paracetamol (or acetaminophen) concentration is being measured.
The plasma paracetamol concentration is used to establish a diagnosis of paracetamol over dosage and to help decide on the need for treatment.
Only when paracetamol over dosage is a possibility.
The plasma paracetamol concentration at a known time point between 4 and 15 hours after a single overdose has been taken, indicates the likelihood of liver damage developing after 2 or 3 days. This test therefore helps the doctor decide on the need for antidotal treatment to minimise the risk of such damage occurring.
Taking as few as ten to twenty 500 milligram paracetamol tablets at once can cause serious, possibly fatal liver damage 2-4 days afterwards unless antidotal treatment is given within 8 hours. It is likely that there will be no symptoms of poisoning for 24-36 hours after taking the paracetamol even if a potentially fatal dose has been ingested. If paracetamol has been taken above the recommended dose you should seek medical help as soon as possible.
There is increased risk of liver injury with an overdose if persons are malnourished for any reason or alcoholic or if fasting for more than a day.
Paracetamol is one of the safest, most effective drugs known if used at the recommended dose and dose interval.
No, if paracetamol poisoning is suspected, the patient should be taken to hospital immediately.