Contains 9.1% Imidacloprid plus Pyriproxyfen, an insect growth regulator. Advantage II for Dogs controls existing flea infestations on your dog and prevents further infestations.

Kills all flea life stages.

Kills fleas within 12 hours of application. Prevents further infestations for up to 4 weeks. Waterproof.

Note:
When using any topical spot-on flea treatment, you should not bathe your pet 48 hours before or after application. The oils of the skin and coat help to distribute the product properly, ensuring that the product will be effective.