‘Our patient, a 62-year-old man with a history of depression, presented to an emergency department 5 hours after ingesting antifreeze (Fleet Charge SCA Precharged Coolant/Antifreeze [Peak]).’
http://www.nejm.org/doi/full/10.1056/NEJMc1712813
Ever stop at a rest stop on a freeway in Nebraska (or many other states up that way)? They have warnings against giving the water to babies because of the danger of methemoglobinemia (a methyl group attaching itself to your hemoglobin).