calpol? or similar? Isn’t there about 2 paracetamol in them? Overdose I think not.
Its precisely that attitude that makes calpol (and paracetemol based medicines in general) a problem.
Firstly by definition anything over the stated dose is an overdose.
The correct dosage for a 2 year old is unto 7.5mL of Calpol Infant every 4 hours. So consuming a 100 mL bottle is 13x overdosed, and a 200 mL bottle is over 26x the dose. That is a bit like an adult taking 26-52 tablets in one go. If it happened to be the large sized bottle of six plus then there is enough paracetemol in there to give an adult liver damage from an overdose, never mind a two year old.
A 100mL bottle of Calpol infant (available in 200 mL size too), contains enough paracetemol to cause toxicity in a 12 kg child. (That is roughly a 2 yr old).
Fortunately bottles are rarely full to start with, kids are usually not very successful at getting the whole lot into them in one go without major spillage etc, and so whilst single incidents like this are likely to give legitimate cause for concern to both parents and doctors serious outcomes are uncommon. However if the child has been taking calpol all day (or for a few days) for some underlying condition then their ability to metabolise the overdose is further affected.
However, IMHO, the bigger problem is parents assuming that “its just paracetemol” and “there’s barely any in there” and so giving repeated low level doses over prolonged periods of time, too close together etc.