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Canine flea and tick medication is formulated completely differently than feline flea and tick prevention. Do not use a canine flea and tick on a cat it will cause severe reactions and warrant a visit to an emergency veterinary clinic.
Revolution for cats only does flea and heart worm prevention it does not prevent ticks. There is a product on the market called bravecto for cats that does flea and tick
Applying a canine product to a cat often results in intense seizures and muscle tremors.
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Dr. Meghan Denney
You said flea and tick revolution is for fleas only and heartworm prevention
my recommendation stays the same it is not recommended to use dog formulations on cats.
The sentence I am referring to is in your post "I want to get him Revolution Flea and Tick medicine"
Yes I use revolution all the time.
Revolution is used in both cats and dogs but it does not treat for ticks.
I cannot recommend using the canine revolution for a feline because it is off label regardless if the chemistry says they are the same.
And yes it may just be a dose difference but they also may have different carriers that you are not seeing that distribute the medication in the skin
Salamectin is the active ingredient pf revolution : the %of the active ingredient in dogs also can be different that in the the cats dose
I am going to opt out here as I seem to not be communicating effectively for you. I do stay by my recommendation that you should not use canine labeled products for cats unless the label instructs that you are able to do so which revolution for dogs does not contain that in its label .