He drank 3 litres of antifreeze and vomiting and diarrhea started within minutes and was rushed to hospital fully conscious. He didn't tell the doctors what he drank.
They diagnosed him with intestinal infection.
While doctors wasted time not knowing what was causing his symptoms he developed complete anuria and acute kidney injury which quickly progressed and nothing could be done to save his life.
Autopsy revealed he was born with only one kidney.