The short answer
For dogs in Canada, prescription oral preventatives (Bravecto, Simparica Trio) are the most effective. For humans, DEET on skin plus permethrin-treated clothing.
For your dog
The top tier is prescription oral medications available through your Canadian vet. Bravecto kills 100% of ticks within 12 hours and lasts 12 weeks per chew. Its newer injectable form, Bravecto Quantum, provides 12 months from a single shot. Simparica Trio handles ticks, fleas, heartworm, roundworms, and hookworms in one monthly chew. For a speed comparison, see which products kill ticks fastest.
Without a prescription, the Seresto collar is the most popular option, providing up to 8 months of continuous flea and tick protection.
Cornell Veterinary Medicine notes: “Prescription tick medications tend to be more effective than those you buy over the counter.” Your vet can match the right product to your dog’s age, breed, and risk level. Some breeds need extra attention due to coat type.
For you (the human walking the dog)
If you’re hiking the Bronte Creek trails, walking through Sixteen Mile Creek, or anywhere with tall grass in the Halton Region, the CDC hierarchy is clear:
- DEET (20 to 30% concentration) on exposed skin. Still the gold standard.
- Picaridin (20%) works equally well with a less greasy feel.
- Permethrin (0.5%) on clothing. It kills ticks on contact and survives multiple washes. This is what the military uses.
- Oil of Lemon Eucalyptus (OLE/PMD) is the top natural option with EPA registration.
A note for Canadians: 0.5% permethrin spray for DIY clothing treatment isn’t widely available in Canada. Pre-treated outdoor clothing is easier to find.
The most effective approach combines layers: permethrin on your clothes, DEET on your skin, and your dog on a vet-prescribed oral preventative. If you’re curious about natural alternatives, we cover what smells ticks hate most in a separate post.
Key takeaways
- For dogs: prescription oral preventatives (Bravecto, Simparica Trio) are the most effective products available in Canada.
- For humans: DEET or picaridin on skin, permethrin-treated clothing.
- A layered approach combining multiple methods is more effective than any single product.
- Permethrin spray for clothing is hard to find in Canada; pre-treated gear is the easier option.
- Talk to your vet about which product is right for your dog’s specific situation.
References
- AKC. “Best Flea and Tick Prevention for Dogs.” akc.org
- Cornell University College of Veterinary Medicine. “Flea and Tick Prevention.” vet.cornell.edu
- Canada Pet Care. “Top Flea and Tick Treatments for Dogs 2025.” canadapetcare.com
- Global Lyme Alliance. “Best Defense Against Ticks.” globallymealliance.org
- CanLyme. “Permethrin: An Underused Tool for Prevention.” canlyme.com