You can forget about a flea bath when safe handling of a feral cat or kitten with fleas is impossible! A safe and effective flea treatment for cats and kittens four weeks and older is to add crushed to the cats’ food. For kittens four to eight weeks old, the dose is a half-pill. You do not need a prescription for Capstar, and you can purchase it online at any of the pet medication websites, or even from some pet supply stores. Capstar has no unpleasant taste and it kills fleas in three to six hours.
The Best Anti-Flea Medicines for Cats - Pets
Revolution is a safe and simple monthly topical medication used to protect your pet from heartworms, fleas, and ear mites. It also protects dogs from ticks and sarcoptic mange and cats from roundworms and hookworms. Revolution for Dogs and Cats requires a prescription from your veterinarian. (3 Pack = 3 doses which lasts 3 months.)
Can Cats Take Flea and Tick Medication for Dogs? | PetCareRx
Capstar for Dogs and Cats is a tablet that kills adult fleas. It starts working within 30 minutes, but won't kill flea eggs and larvae so it might have to be administered several times to completely get rid of an infestation. Some say it's most effective when used combined with a monthly treatment for both immediate and long term relief. A version for large dogs (over 25 pounds) is also available.
Bravecto for Cats | Topical Flea Treatment - 1800PetMeds