I am a crap mum - I left a bottle of Calpol equivalent in reach of DS2.
He drank approx. 75ml - it was incredibly frightening - the Poison Control Centre was involved and there was talk of irreversible liver damage.
He has been in hospital all day - at last the final blood tests came back to give him a clear liver function so we were allowed to bring him home. He has had an IV "antidote", they induced vomiting and gave him charcoal orally.
What a crap mum I am