Are Seresto Collars Toxic to Humans?

Since Seresto flea and tick collars were introduced in 2012, the EPA has received incident reports of at least 1,698 related pet deaths. Overall, through June 2020, the agency has received more than 75,000 incident reports related to the collars, including nearly 1,000 involving human harm.

Can Seresto collars cause cancer?

One study has linked dogs' exposure to certain topical insecticides — though not the ones Seresto uses — to an increased risk of bladder cancer.

Are flea collars toxic for humans?

Many of these products do their jobs handsomely, but two of the most egregious chemicals widely used in flea collars, tetrachlorvinphos and propoxur, have been shown to cause damage to our brains and nervous systems, and are known human carcinogens.