Stronghold Blue for cats prevents fleas, heartworm, ear mites, hookworm and roundworm.

Stronghold Blue 3 for Cats between 2.6 – 7.5 kg (5.7-15.5 lbs.) 45mg, works quickly and for one whole month after a single application. 3 doses will give your adorable little fur ball all the help it needs in the fight against both internal and external parasites, such as:
Fleas–adults, eggs, and larvae
Heartworms
Intestinal worms—hookworm and roundworm
Ear mites
Biting lice
This powerful topical boasts a variety of usages, and requires very little effort on your part to keep your cat at a healthy level of frisky curiosity, or apathetic lethargy. It just depends on that testy tabby’s mood. Wait at least 2 hours after treatment to bathe your cat.