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PetArmor CapAction is an over-the-counter oral flea tablet for small dogs and puppies. Each tablet contains nitenpyram, the same active ingredient as Capstar, and starts killing adult fleas within about 30 minutes, reaching over 90% kill within four hours. It is a short-acting knockdown pill, not a monthly preventive, so it suits dogs that need fast relief while a longer-term flea control plan takes effect. It is cheaper than a vet visit and easier than topical treatments, but it does nothing for ticks, eggs or larvae, and fleas can return within a day if the environment is not treated.
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Lowest price we've seen: $31.48 on Nov 11 at Walmart. Tracked across 6 stores since Nov 11.
Owners rate it around 4.1 out of 5 and mostly praise how quickly fleas drop off after dosing. Complaints center on short duration, vomiting in sensitive dogs and fleas coming back when the home is not treated.
PETARMOR CAPACTION is an oral flea treatment for small to medium-size dogs. Each tablet contains nitenpyram, the same active ingredient as CAPSTAR. It is given by mouth, so there is no messy topical application.
The tablet works from the inside out. It starts killing adult fleas within 30 minutes and reaches greater than 90% effectiveness against adult fleas on the dog within four hours.
It is an over-the-counter product for dogs 4 weeks of age and older that weigh 2 to 25 pounds. It is safe for pregnant or breeding dogs.





