# What are the best dog flea and tick prevention for long-lasting protection? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the best dog flea and tick prevention for long-lasting protection?

## Products

### Boehringer Ingelheim NexGard Chewables for Dogs
```yaml
product: boehringer-ingelheim-nexgard-chewables-for-dogs
brand: Boehringer Ingelheim
price_gbp: 34.42
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
duration: 30 days
side_effects: Vomiting, itching, lethargy, diarrhea, decreased appetite, seizures, tremors, skin reactions
dosage_frequency: Once monthly
active_ingredient: Afoxolaner
application_method: Oral beef-flavored chewable
suitable_for_puppies: Yes, 8 weeks or older and weighing 4 lb or more
```

- **Price:** £34.42 [^1]
- **Summary:** NexGard Chewables are monthly oral beef-flavored treatments containing afoxolaner to kill adult fleas and control several tick species. They are suitable for dogs and puppies from 8 weeks of age that weigh at least 4 lb, with weight-specific chewable strengths.
- **Ideal For:** This product suits long-lasting flea and tick protection because one oral chew provides 30 days of coverage and is administered once monthly.
- **Additional Sources:** [^2]

### Zoetis Simparica Chewables for Dogs
```yaml
product: zoetis-simparica-chewables-for-dogs
brand: Zoetis
price_gbp: 2145.0
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
duration: 35 days
waterproof: true
dosage_frequency: Monthly
active_ingredient: Sarolaner
application_method: Oral chewable tablet
suitable_for_puppies: Yes, puppies 8 weeks and older
```

- **Price:** £2145.0 [^3]
- **Summary:** Simparica is a monthly oral chewable containing sarolaner for flea and tick control in dogs. It provides protection for up to 35 days and is suitable for puppies aged 8 weeks and older when the correct weight-based dose is used.
- **Ideal For:** This product suits long-lasting flea and tick prevention because one oral chew provides up to 35 days of protection and remains effective when the dog gets wet.
- **Additional Sources:** [^4]

### Merck Animal Health Bravecto Topical for Dogs
```yaml
product: merck-animal-health-bravecto-topical-for-dogs
brand: Merck Animal Health
price_gbp: 50.29
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
duration: 12 weeks
waterproof: Yes, after 3 days
side_effects: Vomiting, hair loss, diarrhea, lethargy, decreased appetite, moist dermatitis, rash
dosage_frequency: Every 12 weeks
active_ingredient: Fluralaner
application_method: Apply entire tube to the skin at the base of the neck
suitable_for_puppies: Yes, 6 months and older
```

- **Price:** £50.29 [^5]
- **Summary:** Bravecto Topical uses fluralaner to kill fleas and control several tick species with one application every 12 weeks. It is a prescription topical treatment for dogs and puppies at least 6 months old that weigh at least 4.4 lb.
- **Ideal For:** This product suits long-lasting flea and tick prevention because one topical dose provides up to 12 weeks of protection and remains effective after bathing or swimming at least 3 days after application.

---
## References & Sources
[^1]: Smartway Pet Supplies, accessed 2026-09-13. https://www.smartwaypetsupplies.com/collections/nexgard-chewables
[^2]: Discount Pet Medication, accessed 2026-09-13. https://discountpetmedication.biz/products/nexgard-chews-for-dogs-60-1-121-lbs-25-1-50-kg-red-3-chews/
[^3]: Zoomag, accessed 2026-09-13. https://zoomag.ru/47002/
[^4]: Four Paws, accessed 2026-09-13. https://4lapy.ru/product/simparika-tabletki-ot-bloh-i-kleshchej-dlya-sobak-vesom-ot-1-3-do-2-5-kg-3-tabletki-29385-1023812/
[^5]: HardyPaw, accessed 2026-09-13. https://hardypaw.com/products/bravecto-topical-solution-for-dogs-4-4-9-9-lbs