Capstar Oral Treatment

If you’re actively fighting a flea infestation in your home, Capstar is a go-to flea treatment product. The oral tablet starts killing adult fleas within 30 minutes, and it can be given every 24 hours until the infestation is under control.  

“This product is best for pet parents looking for help getting a flea infestation under control,” says Dr. Cornett. “I would use this over others, because it can be used daily, starts to work in 30 minutes, does not need a prescription, and can be combined with other flea products.” 

But note that this is not a preventive medication, and it should be used only if your kitty is already crawling with fleas. “This is a great first-step product that kills existing fleas quickly,” says Dr. Howe. 

Your cat needs to be at least 4 weeks old and 2 pounds to take this product. As a tablet, it needs to be administered orally, making it ideal for cats who tolerate taking pills.