Comfortis is a 30 day pill that gets rid of fleas by killing the adults and breaking the flea cycle. It was approved in August 2012 for use in cats but word has been slow to get out.
Comfortis for Dogs and Cats - Flea Chewables | PetCareRx
I have two outdoor dachshunds which I started on Comfortis last year...one in November and the other in December. It is now the middle of April and they've only been treated with one pill each. Still no fleas! I am so impressed with this product!! We've had no side effects.
I do wish they would come out with a pill for my two cats. I don't like applying the pet meds to the back of their necks, as they always try to clean it off.
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Comfortis pills are used for flea prevention and treatment in cats and dogs. In lab tests, Comfortis began killing fleas within 30 minutes of dose administration and killed 98-100% of all fleas in four hours. Owners who want to use the medication for flea prevention can administer one flavored pill once a month throughout the year, if fleas are common year-round in their area.
Comfortis for Use in Cats: Is it Safe and Effective? | Pet Meds News