A MOTHER WHOSE son ended up with severe medical issues as a result of his use of nitrous oxide, commonly known as laughing gas, is now warning parents about the dangers of the drug. Floppy leg syndrome is a term for the severe weakness, paralysis, or inability to walk, caused by nitrous oxide abuse. After her experience, the woman is sharing her story to warn other parents about the dangers of nitrous oxide. The woman is urging parents to be aware of the signs of nitrous oxide abuse by looking out for paraphernalia associated with it. However, he said it has been recognised that the drug is being imported for non-legitimate purposes, adding that Revenue Commissioners have seized 250,000 kg of nitrous oxide canisters.