Best 5 flea medicine for cats 2019. Product Name:Bayer Advantage II Flea Prevention for Cats, 6 Dose by Bayer Animal Health. Product Link: https://www.amazon.com/gp/product/B00... Product Name: Elanco Animal Health Cheristin for Cats Topical Flea Treatment and Prevention - Long Lasting and Fast Acting Cat Flea Treatment by Elanco Animal Health. Product Link: https://www.amazon.com/gp/product/B01... Product Name: Frontline Plus for Cats 3 Month by lambertvetsupply. Product Link: https://www.amazon.com/gp/product/B00... Product Name: Capstar Fast-Acting Oral Flea Treatment for Small Dogs and Cats, 6 Doses, 11.4 mg (2-25 lbs) by Elanco Animal Health. Product Link: https://www.amazon.com/gp/product/B07... Product Name: Bayer Advantage II Flea Prevention for Large Cats, Over 9 lbs by Bayer Animal Health. Product Link: https://www.amazon.com/gp/product/B00...