Ethylene glycol antifreezes are poisonous and should be kept away from any person or animal (children and especially cats) that might be tempted by its sweet taste. They form calcium oxalate crystals in the kidneys and can cause acute renal failure and death. All spills should be cleaned, or else an area in which it may be present should be kept inaccessible.
Should ingestion of antifreeze occur, ethanol (alcoholic beverages) can be administered until proper treatment can be started in order to slow the conversion of methanol to formaldehyde and formic acid which are the substances responsible for methanol's toxicity. In practice, ethanol can be administered intravenously by doctors to counter ethylene glycol and methanol poisoning, but now that another antidote is available (fomepizole), its popularity for this application is greatly in decline