# 哪种狗用跳蚤和蜱虫预防药对跳蚤和蜱虫的各个生命周期阶段最有效？ — 经过验证的规格比较

> 所有规格数据均已通过官方渠道验证。

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

## 产品列表

### 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
```

- **价格:** £47.79 [^1]
- **概述:** 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.
- **最适合:** 本产品适合需要覆盖跳蚤和蜱虫各个生命周期阶段防护的犬只，因为氟雷拉纳可杀灭成年跳蚤、防止跳蚤 infestations，并在一次口服给药后最长 12 周内杀灭多种蜱虫。
- **附加来源:** [^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
```

- **价格:** £44.37 [^4]
- **概述:** 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.
- **最适合:** 特别适合需要覆盖跳蚤各个生命周期阶段和蜱虫各个生命周期阶段的犬只，因为吡虫啉可杀灭成年跳蚤和跳蚤幼虫，而氟氯苯菊酯可驱避和杀灭所有生命周期阶段的蜱虫。

### 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
```

- **价格:** £155.28 [^5]
- **概述:** 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.
- **最适合:** 适合需要针对跳蚤和蜱虫多个生命周期阶段进行防护的狗，因为lotilaner可杀灭成年跳蚤并治疗和控制四种蜱虫，同时该产品还可每月防护多种体内寄生虫。
- **附加来源:** [^6]

---
## 参考来源
[^1]: PetSmart, 访问日期 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, 访问日期 2026-09-13. https://www.petco.com/product/bravecto-chewable-tablet-for-dogs-orange
[^3]: PetVM, 访问日期 2026-09-13. https://petvm.com/flea-tick/45-bravecto.html
[^4]: Petco, 访问日期 2026-09-13. https://www.petco.com/product/seresto-flea-and-tick-collar-for-dogs
[^5]: PetSmart, 访问日期 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, 访问日期 2026-09-13. https://www.petmartpharmacy.com/credelio-quattro-for-dogs-11522/