# Which brands offer the most reliable dog flea and tick prevention products? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which brands offer the most reliable dog flea and tick prevention products?

## Products

### NexGard NexGard afoxolaner Chewables for Dogs
```yaml
product: nexgard-nexgard-afoxolaner-chewables-for-dogs
brand: NexGard
price_gbp: 67.45
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
duration: 30 days
side_effects: Vomiting, dry or flaky skin, diarrhea, lethargy, decreased appetite, tremors, ataxia, seizures, and allergic reactions
dosage_frequency: Once monthly
active_ingredient: Afoxolaner 11.3 mg, 28.3 mg, 68 mg, or 136 mg per chew
application_method: Oral soft chew, with or without food
suitable_for_puppies: Yes, for puppies 8 weeks or older and weighing at least 4 lbs
```

- **Price:** £67.45 [^1]
- **Summary:** NexGard is a beef-flavored oral chew containing afoxolaner that kills fleas and controls several tick species for 30 days. It is suitable for dogs and puppies from 8 weeks of age weighing at least 4 lbs and is given once monthly.
- **Ideal For:** NexGard suits shoppers seeking reliable flea and tick prevention because its afoxolaner chew is FDA-approved, works for 30 days, kills fleas before they lay eggs, and is suitable for puppies from 8 weeks of age.
- **Additional Sources:** [^2]

### Frontline Frontline Plus fipronil and S-methoprene Flea and Tick Topical for Dogs
```yaml
product: frontline-frontline-plus-fipronil-and-s-methoprene-flea-and-tick-topical-for-dogs
brand: Frontline
price_gbp: 19.66
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
duration: 30 days
waterproof: true
side_effects: Skin irritation, vomiting, diarrhea, seizure
dosage_frequency: Once monthly
active_ingredient: Fipronil 9.8% and S-methoprene 8.8%
application_method: Apply the full applicator contents to the skin between the shoulder blades
suitable_for_puppies: Yes, puppies 8 weeks or older and weighing at least 5 lbs
```

- **Price:** £19.66 [^3]
- **Summary:** Frontline Plus is a monthly topical treatment containing fipronil and S-methoprene to control fleas and ticks, including flea eggs and larvae. It is waterproof after drying and is suitable for dogs and puppies at least 8 weeks old and weighing at least 5 lbs.
- **Ideal For:** This product suits owners seeking reliable dog flea and tick prevention because it combines two active ingredients, provides 30 days of protection, is waterproof, and targets multiple flea life stages.

### K9 Advantix K9 Advantix II permethrin and imidacloprid Topical for Dogs
```yaml
product: k9-advantix-k9-advantix-ii-permethrin-and-imidacloprid-topical-for-dogs
brand: K9 Advantix
price_gbp: 46.13
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
duration: 30 days
waterproof: Yes, after 24 hours
side_effects: Redness, scratching, skin discomfort, vomiting, diarrhea, lethargy, agitation
dosage_frequency: Every 30 days
active_ingredient: Imidacloprid 8.80%, permethrin 44.00%, pyriproxyfen 0.44%
application_method: Apply the entire tube to 2 to 3 spots on the skin along the back from the shoulders to the base of the tail
suitable_for_puppies: Yes, 7 weeks and older weighing at least 4 lbs
```

- **Price:** £46.13 [^4]
- **Summary:** K9 Advantix II is a monthly topical treatment that kills and repels fleas, ticks, mosquitoes, biting flies, and lice through contact. It is waterproof after 24 hours and is suitable for dogs and puppies at least 7 weeks old that meet the applicable weight requirement.
- **Ideal For:** K9 Advantix II suits owners seeking reliable dog flea and tick prevention because its imidacloprid, permethrin, and pyriproxyfen formula provides monthly protection, repels ticks before attachment, and remains waterproof after 24 hours.
- **Additional Sources:** [^5], [^6]

---
## References & Sources
[^1]: 1800PetMeds, accessed 2026-09-13. https://www.1800petmeds.com/dog/flea-tick-parasite/product/nexgard-flea-tick-prevention-chewable-tablets/prod10356.html
[^2]: PetSmart, accessed 2026-09-13. https://www.petsmart.com/dog/flea-and-tick/flea-and-tick-pills/nexgard-chewable-tablets-for-dogs-601-121-lbs-red-box---1-3-or-6-month-supply-66721.html
[^3]: 1800PetMeds, accessed 2026-09-13. https://www.1800petmeds.com/dog-or-cat/otc-flea-and-tick/product/frontline-plus/prod10459.html
[^4]: Petco, accessed 2026-09-13. https://www.petco.com/product/k9-advantix-ii-topical-medium-dog-flea-and-tick-treatment
[^5]: Huber's Animal Health, accessed 2026-09-13. https://www.hubersanimalhealth.com/product/k9-advantix-ii-medium-dog-11-20-lb-4-pack/
[^6]: HardyPaw, accessed 2026-09-13. https://hardypaw.com/products/k9-advantix-ii-topical-flea-tick-protection-medium-dogs-teal-box