Help keep your pal pest-free with the Capstar Flea Tablets for Dogs. Each tablet contains an active ingredient called Nitenpyram thats effective in eliminating fleas in dogs and puppies. The fast-acting formula starts working within 30 minutes and has been proven to be more than 90% effective in eliminating adult fleas within just hours. That means less itchiness and discomfort for your pooch, much fasterand without the mess and odors of a topical solution. Just give the tablet as directed, and let the formula do its work. A single dose should do it, but its also safe to keep giving daily if your pal gets infested again, until all the fleas are gone.