NEXGARD SPECTRA kills fleas fast, within 6 to 12 hours all month long. Rapid action and consistent treatment kills newly acquired fleas before they can lay eggs. Fleas are more than just a nuisance. You can see how distressing the itching can be, but fleas can also cause skin problems and even transmit disease. Fleas not only live on your dog, but in their environment too – their bedding, the carpet and more! If you want to get rid of fleas you need to kill the ones on your dog and those living in your home. Fleas aren’t just a problem in summer – to stay flea-free, you need to use flea control all year round.