Flea & Tick Prevention: What Actually Works and What’s a Waste of Money

This article contains affiliate links. We may earn a commission from qualifying purchases.

Some content on this site is AI-assisted and reviewed by our editorial team.

We’ve spent $400+ on flea and tick prevention over the past year testing different options for our dogs. Some of it was money well spent. Some of it was essentially expensive placebo. Here’s what actually works, what’s a waste, and how to save money without risking your dog’s health.

The Options, Ranked by Effectiveness

1. Oral Preventives (NexGard, Bravecto, Simparica)

These are the gold standard right now. A chewable pill once a month (Bravecto is every 12 weeks) that kills fleas and ticks. They work fast — most kill fleas within 4 hours and ticks within 12.

NexGard: ~$25/month. Monthly chewable. Kills fleas and ticks. Our vet’s top recommendation.

Bravecto: ~$50/3 months. Every-12-weeks chewable. Same effectiveness, less frequent dosing. Works out to ~$17/month — actually cheaper per month.

Simparica: ~$25/month. Monthly. Similar effectiveness to NexGard. Some dogs tolerate it better.

Verdict: If you can afford it, oral preventives are the most effective and convenient. Bravecto is the best value per month if your dog tolerates it.

NexGard on Amazon | Compare prices on Amazon (affiliate links)

Bravecto on Amazon | Compare prices on Amazon (affiliate links)

Simparica Trio on Amazon | Compare prices on Amazon (affiliate links)

2. Topical Treatments (Frontline Plus, Advantix II)

The old standby. You squeeze a liquid between your dog’s shoulder blades once a month. It works, but there are catches.

Frontline Plus: ~$15/month. Kills fleas, ticks, and their eggs. But it takes 24-48 hours to kill ticks, which is enough time for disease transmission in some cases.

Advantix II: ~$18/month. Kills and repels fleas, ticks, and mosquitoes. The repelling action is a genuine advantage — ticks don’t even attach.

Verdict: Still effective, especially Advantix II’s repelling action. But the oily residue on the coat is gross, you can’t pet your dog around the application site for 24 hours, and some dogs have skin reactions.

Frontline Plus on Amazon | Compare prices on Amazon (affiliate links)

K9 Advantix II on Amazon | Compare prices on Amazon (affiliate links)

3. Flea Collars (Seresto)

Seresto is the only flea collar worth discussing. It costs about $50-60 and lasts 8 months, which works out to roughly $6-8/month. That’s a great price.

The problem: effectiveness drops off significantly after month 5-6 in our experience. We still found live ticks on our dog at month 6, which defeats the purpose.

Verdict: Good as a supplement or for low-risk situations. Don’t rely on it as your sole prevention in high-tick areas.

Seresto Collar on Amazon | Compare prices on Amazon (affiliate links)

4. Natural/Herbal Remedies

Essential oils, garlic supplements, apple cider vinegar, diatomaceous earth — we tried them all because people swear by them on Facebook. The results were consistent: they don’t work.

Garlic can actually be toxic to dogs in the amounts people recommend. Diatomaceous earth works on fleas already in your house, not on your dog. Essential oil sprays might repel fleas briefly but don’t kill them.

Verdict: Skip these. They’re not effective, and some are actively dangerous.

The Cost Comparison

n

ThriftyPaw is reader-supported. As an Amazon Associate, we earn from qualifying purchases. This means we may earn a small commission when you buy through links on this site at no additional cost to you. We only recommend products we genuinely believe in. Thank you for supporting ThriftyPaw.