Our rankings are generated through the algorithmic analysis of thousands of customer reviews about products, brands, merchant customer service levels, popularity trends, and more. We use advanced technology, including AI, to help process and organize this information at scale, supporting our analysis with greater speed and consistency. The rankings reflect our opinion and should be a good starting point for shopping.
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10 Best flea killer for cats of 2026
Save up to 15% off
Best Choice1
Capstar9.9Exceptional
Capstar (nitenpyram) Cat Flea Treatment, Fast-Acting Oral Flea Treatment for Cats 2-25 lbs, Vet-Recommended Medication Tablets Start Killing in 30 Minutes, 6 Doses
Limited Time Deal-
Onset of Action:Starts killing fleas in 30 minutes
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Cat Weight Range:2-25 lbs
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Dose Size:11.4 mg
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Form:Oral Tablets
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Active Ingredient:nitenpyram
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Value for Money2
PetArmor9.7Exceptional
PetArmor CAPACTION (nitenpyram) Oral Flea Treatment for Cats, Cat Flea Treatment Pill, Fast Acting Tablets Start Killing in 30 Minutes, 2-25 lbs, 6 Doses
15% Off
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3
Advantage9.5Excellent
Advantage II Large Cat Vet-Recommended Flea Treatment & Prevention | Cats Over 9 lbs. | 2-Month Supply
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is discontinued by manufacturer:No
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product dimensions:1 x 4.38 x 4.75 inches; 0.64 ounces
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asin:B00N7DEFH6
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date first available:September 1, 2014
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item model number:86336677
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4
Hartz9.2Excellent
Hartz UltraGuard Topical Flea & Tick Prevention for Cats and Kittens - 3 Monthly Treatments
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is discontinued by manufacturer:No
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product dimensions:0.58 x 4.25 x 6.69 inches 0.06 ounces
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asin:B07D3DTSDT
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date first available:May 15, 2018
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item model number:032700156848
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5
Frontline9.0Excellent
FRONTLINE Plus Flea & Tick Spot Treatment for Cat & Kitten (Green) Count of 3
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is discontinued by manufacturer:No
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product dimensions:6 x 4.5 x 0.5 inches; 1.13 ounces
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asin:B0002J1F76
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date first available:October 2, 2001
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item model number:FL287410
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6
Wondercide8.9Very Good
Wondercide Flea Tick & Mosquito Spray for Pets & Home - Rosemary 16 fl oz
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Main Ingredients:Natural Essential Oils
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Type:Flea, Tick & Mosquito Spray
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Pet Compatibility:Dogs, Cats
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Scent:Rosemary
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Volume:16 oz
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7
Advantage8.7Very Good
Advantage II Large Cat Vet-Recommended Flea Treatment & Prevention | Cats Over 9 lbs. | 1-Month Supply
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is discontinued by manufacturer:N/A
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product dimensions:4.25 x 0.87 x 4.72 inches 0.63 ounces
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asin:B07N9LSPRY
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date first available:March 27, 2019
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item model number:90204382
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8
Amazon Basics8.6Very Good
Amazon Basics Preventative Topical Flea Treatment and Prevention for Large Cats (Over 9 Pounds), Kills Fleas Within 12 Hours, 6 Count
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is discontinued by manufacturer:N/A
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product dimensions:1.4 x 4.27 x 6.5 inches 0.86 ounces
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asin:B095SN7FNF
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date first available:March 21, 2023
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item model number:11334
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9
Advantage8.4Good
Advantage II Large Cat Vet-Recommended Flea Treatment & Prevention | Cats Over 9 lbs. | 6-Month Supply
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10
Vet's Best8.3Good
Vet's Best Flea & Tick Indoor Home Spray for Cats, Cotton Spice, 32 oz
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