Safety Guidelines for Flea Medicines
NEVER give a pet a medicine for the wrong weight. You need to precisely weigh your pet on a scale and give it a product that is appropriate based on their weight and what the product says it applies to. Many of the negative reactions were in cats or small dogs, when people had given the pet something designed for a much larger dog. Do not guess the pet's weight, and do not decide you are going to save money by splitting a large dog product among multiple dogs (these are common causes listed by the EPA for toxic reactions).
NEVER give a puppy or a kitten medicine before the age on the product's instructions. If you've got doubts about when the pet was born, wait at least a few weeks.
Do not give flea medicines to sick animals without consulting a vet first.
Do not give flea medicines to elderly pets without consulting a vet first.
ALWAYS check with younger animals to see if there's a medicine designed specifically for puppies or kittens.
ALWAYS read the instructions for the product you are using, including any warnings. Follow the instructions - they're there for a reason.
ALWAYS separate your pets from each other for some time after treatment. A number of the incidents (especially with cats) happened when the pets would interact with each other and rub the product onto each other. This results in an incorrect dosage.
ALWAYS check to make sure your flea medicine hasn't been counterfeited (link to page).
WHEN IN DOUBT, talk to your vet first.
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