# Which dog flea and tick prevention is most effective against various life stages of fleas and ticks? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

Which dog flea and tick prevention is most effective against various life stages of fleas and ticks?

## Products

### Merck Animal Health Bravecto Chews for Dogs 9.9 - 22 lbs
```yaml
product: merck-animal-health-bravecto-chews-for-dogs-9-9-22-lbs
brand: Merck Animal Health
price_gbp: 47.79
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
duration: 12 weeks for fleas and most ticks; 8 weeks for lone star ticks
side_effects: Vomiting, lethargy, diarrhea, anorexia, pruritus
dosage_frequency: Every 12 weeks
active_ingredient: Fluralaner 250 mg
application_method: Oral chew given with food
suitable_for_puppies: Yes, for puppies 6 months and older
```

- **Price:** £47.79 [^1]
- **Summary:** Bravecto is a prescription oral chew containing 250 mg of fluralaner for dogs weighing over 9.9 to 22 lbs. One chew provides 12 weeks of flea and protection against most listed ticks, and 8 weeks of lone star tick protection. It is suitable for dogs and puppies 6 months and older.
- **Ideal For:** This product suits dogs needing protection across flea and tick life stages because fluralaner kills adult fleas, prevents flea infestations, and kills several tick species for up to 12 weeks after one oral dose.
- **Additional Sources:** [^2], [^3]

### Elanco Seresto Vet-Recommended Flea & Tick Prevention Collar for Small Dogs Under 18 lbs
```yaml
product: elanco-seresto-vet-recommended-flea-tick-prevention-collar-for-small-dogs-under-18-lbs
brand: Elanco
price_gbp: 44.37
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
duration: 8 months
waterproof: No, water-resistant
side_effects: Scratching, redness, itchiness, hair loss, dermatitis, inflammation, eczema, or other skin reactions
dosage_frequency: Single application every 8 months
active_ingredient: Imidacloprid 1.25g and flumethrin 0.56g
application_method: Place collar around the dog's neck, adjust to fit two fingers beneath it, and trim excess length
suitable_for_puppies: Yes, puppies 7 weeks and older
```

- **Price:** £44.37 [^4]
- **Summary:** This collar uses imidacloprid and flumethrin to kill fleas and repel and kill ticks through contact. It provides up to 8 months of protection for small dogs under 18 lbs and puppies at least 7 weeks old, and it is water-resistant and non-greasy.
- **Ideal For:** It specifically suits dogs needing coverage across flea life stages and tick life stages because imidacloprid kills adult fleas and flea larvae while flumethrin repels and kills all life stages of ticks.

### Elanco Credelio Quattro Chewable Tablets for Dogs 3.3 lbs and Over
```yaml
product: elanco-credelio-quattro-chewable-tablets-for-dogs-3-3-lbs-and-over
brand: Elanco
price_gbp: 155.28
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
duration: One month
side_effects: Vomiting, diarrhea, decreased appetite, weight loss, dermatitis, itching, tremors, loss of balance, and seizures
dosage_frequency: Once monthly
active_ingredient: lotilaner, moxidectin, praziquantel, and pyrantel
application_method: Oral chewable tablet given with food or within 30 minutes of a meal
suitable_for_puppies: Yes, for puppies 8 weeks and older weighing 3.3 lbs or more
```

- **Price:** £155.28 [^5]
- **Summary:** Credelio Quattro is a monthly oral chewable tablet for dogs and puppies weighing 3.3 lbs or more. It protects against fleas, ticks, heartworm disease, roundworms, hookworms, and tapeworms.
- **Ideal For:** It suits dogs needing protection across multiple flea and tick life stages because lotilaner kills adult fleas and treats and controls four tick species, while the product also provides monthly coverage against several internal parasites.
- **Additional Sources:** [^6]

---
## References & Sources
[^1]: PetSmart, accessed 2026-09-13. https://www.petsmart.com/dog/flea-and-tick/flea-and-tick-pills/bravecto-chew-for-dogs-99-22-lbs-orange-box-1-chew-12-week-supply-67175.html
[^2]: Petco, accessed 2026-09-13. https://www.petco.com/product/bravecto-chewable-tablet-for-dogs-orange
[^3]: PetVM, accessed 2026-09-13. https://petvm.com/flea-tick/45-bravecto.html
[^4]: Petco, accessed 2026-09-13. https://www.petco.com/product/seresto-flea-and-tick-collar-for-dogs
[^5]: PetSmart, accessed 2026-09-13. https://www.petsmart.com/dog/flea-and-tick/flea-and-tick-pills/credelio-quattro-credelio-quattro-ca1-chewable-tablets-for-dogs-33-6-lbs-1-or-6-month-supply-92260.html
[^6]: PetMart Pharmacy, accessed 2026-09-13. https://www.petmartpharmacy.com/credelio-quattro-for-dogs-11522/