The dosage is once a month. Frequent swimming, bathing and direct rain may merit repeated dosing. Start puppies at 7 weeks and kittens at 8 weeks. Do not use on debilitated, aged, pregnant, or nursing animals. Fleas feed on the animal and ingest the active ingredient that prevents the laid eggs from developing into the next stage.
Dosage is a once a month tablet.
Since it requires a flea to bite its host, it probably isn t the best form of flea control for pets that are allergic to flea bites. Safe for puppies and kittens 6 weeks and older, and also for pregnant and lactating animals. Selamectin is approved for flea control and heartworm preventative in dogs and cats. Dosage is once a month. When applied it is rapidly absorbed and distributed to various organs.