TLDR Review: Advantage II Flea Treatment for Large Cats
Verdict
Advantage II Large Cat Flea Treatment is a reliable option for cat owners looking to manage flea prevention, particularly for indoor cats. While it shows rapid efficacy and has a longstanding reputation, certain environments or severe infestations may require additional measures. Make sure to maintain a clean home environment to support the treatment's effectiveness and plan for a potentially challenging application process with your pets.
- Top pro:
- Rapid efficacy with fleas falling off shortly after application, noticeable within 12 hours.
- Top con:
- Fleas may reappear due to environmental factors and newly hatched eggs; consistent cleaning required.
Pros
- •Rapid efficacy with fleas falling off shortly after application, noticeable within 12 hours.
- •Effective preventative treatment with significant reduction in scratching and improved well-being.
- •No adverse reactions observed, even when accidentally ingested by the cat.
- •Trusted and used by cat owners for over 14 years, highlighting reliability.
- •Particularly effective for indoor cats lasting up to 30 days.
- •Provides noticeable improvement in cat's comfort and behavior, including better sleep.
- •Affordable and offers a convenient two-month supply.
- •Recommended for breaking the flea cycle with consistent use and cleaning.
- •Provides significant comfort and reduced stress, especially for elderly cats.
Cons
- •Fleas may reappear due to environmental factors and newly hatched eggs; consistent cleaning required.
- •Application process can be stressful, especially for large or resistant cats.
- •May require complementary treatments for severe infestations effectively.
- •Some users reported a decrease in efficacy in humid climates or with longstanding infestations.
- •Temporary itching observed within a few days post-application.
- •Efficacy duration can vary, some experiencing only 4-5 weeks of effectiveness.
We may earn a commission when you buy through these links, at no extra cost to you. How ShopSavvy makes money
How we researched this
About this review: it summarizes the professional reviews and customer ratings ShopSavvy collected for this product, alongside prices from 5 retailers in ShopSavvy's price data, most recently seen Jun 20, 2026.
Where to Buy
| Retailer | Price | Last seen | Buy |
|---|---|---|---|
| $32.48 | May 12, 2025 may have changed | ||
| $32.48 | May 12, 2025 may have changed | ||
| $32.48 | Oct 1, 2024 may have changed | ||
| $32.99 | May 12, 2025 may have changed | ||
| $33.59 | Jun 20, 2026 may have changed |
Download ShopSavvy App
Compare prices across tens of thousands of stores, set price alerts, watch for deals by keyword, and much more.
Install ShopSavvy Browser Extension
Compare and track prices automatically while you shop online at thousands of websites.
