At least 50 calls have been made to poison control centres in Canada over accidental exposure to certain ingredients in COVID-19 rapid test kits, which can be poisonous if swallowed or absorbed through the skin, warns Health Canada.
In an advisory released on Thursday, the federal department stressed the kits are safe and effective when used as intended. However, many test kits include liquid solutions with chemical preservatives, such as sodium azide and ProClin preservatives that can pose a danger if ingested — particularly for children and pets.
“Small doses of sodium azide can lower blood pressure, and larger doses may cause more
