Bravecto vs NexGard vs Simparica: Which Flea and Tick Treatment Is Right for Your Dog?
Every South African dog owner has had that moment - you're giving belly rubs and your fingers brush over something small, round, and very much alive. Ticks are a fact of life here, especially if you live anywhere near the bush, coast, or basically anywhere that isn't a sealed concrete box.
The good news is that flea and tick prevention has come a long way from the greasy spot-on treatments of the early 2000s. Today, the three big names in oral flea and tick protection are Bravecto, NexGard, and Simparica. Each works slightly differently, lasts a different amount of time, and suits different dogs.
I get asked about these almost daily, so let's lay it all out.
How Do Oral Flea and Tick Treatments Work?
All three products belong to a class of drugs called isoxazolines. These compounds work by targeting the nervous system of parasites - specifically, they block neurotransmitter receptors that are essential for parasite survival. When a flea or tick bites your dog and ingests the active ingredient through the bloodstream, the parasite becomes hyperexcited, paralysed, and dies.
The key thing to understand is that the parasite needs to bite your dog for the treatment to work. These aren't repellents - they're fast-acting killers. Fleas typically die within hours of biting, and ticks within 12-48 hours depending on the product.
Bravecto: The Long-Lasting Option
Bravecto is probably the most popular flea and tick treatment in South Africa right now, and the main reason is convenience. A single chew protects against fleas for 12 weeks and ticks for up to 12 weeks depending on the tick species. That's roughly three months of coverage from one tablet.
- Active ingredient: Fluralaner
- How often: Every 12 weeks (approximately every 3 months)
- What it covers: Fleas, paralysis ticks, brown dog ticks, bush ticks, and yellow dog ticks. Also effective against certain mite species (Demodex, Sarcoptes).
- Minimum age: 8 weeks and at least 2kg body weight
The big selling point is that you only need to remember to dose four times a year. For people who forget monthly treatments (honestly, that's most of us), Bravecto removes a lot of the guesswork. The chew is flavoured and most dogs take it willingly - though I've met a few stubborn customers who need it hidden in a piece of biltong.
Bravecto also comes in a spot-on formulation for dogs who don't do well with chewables, and there's a separate Bravecto for cats available as a spot-on.
NexGard: Monthly Protection, Fast Kill
NexGard is the monthly alternative to Bravecto, and it's been a market leader worldwide for years. It's made by the same company behind Frontline, but works systemically rather than topically.
- Active ingredient: Afoxolaner
- How often: Every month
- What it covers: Fleas and ticks (including paralysis ticks, brown dog ticks, and bush ticks)
- Minimum age: 8 weeks and at least 2kg body weight
NexGard's advantage is a very fast flea kill - typically within 6-8 hours. For dogs in heavy flea environments, that speed matters. The monthly dosing schedule also means you can stop treatment more quickly if your dog has an adverse reaction, since the drug clears the system faster than Bravecto's longer-acting formulation.
NexGard Spectra is worth mentioning here - it combines afoxolaner with milbemycin oxime, which adds protection against intestinal worms and heartworm. If you want flea, tick, AND worm coverage in a single monthly chew, Spectra is the all-in-one option.
Simparica: The Middle Ground
Simparica is often described as the middle ground between Bravecto and NexGard, and that's a fair characterisation. It's a monthly chew, but some studies suggest it may have a slightly broader spectrum against certain tick species.
- Active ingredient: Sarolaner
- How often: Every month (Simparica) or every month (Simparica Trio)
- What it covers: Fleas, ticks (five species), and - in the Trio formulation - heartworm, roundworm, and hookworm
- Minimum age: 8 weeks and at least 1.25kg body weight
Simparica Trio is particularly interesting because it covers fleas, ticks, heartworm, and intestinal worms in one chew. For dog owners who want simplified parasite control without multiple products, it's a strong option. The lower minimum weight (1.25kg vs 2kg) also makes it accessible for very small breed puppies slightly earlier.
Side-by-Side Comparison
Here's how they stack up on the things that matter most:
- Duration: Bravecto wins for convenience at 12 weeks. NexGard and Simparica are both monthly.
- Speed of flea kill: NexGard is marginally fastest at 6-8 hours. Bravecto and Simparica are comparable at 8-12 hours.
- Tick coverage: All three cover the major SA tick species. Simparica may have a slight edge on some species based on certain studies, though real-world differences are minimal.
- Worm protection: Only NexGard Spectra and Simparica Trio include deworming. Bravecto requires a separate dewormer.
- Mite treatment: Bravecto has the most data supporting its use against Demodex and Sarcoptic mange.
- Price per month: Bravecto generally works out slightly cheaper per month due to its 3-month duration, though pricing varies by weight range.
What About Frontline and Other Spot-Ons?
Frontline is still widely used, particularly the Frontline Plus formulation that combines fipronil with an insect growth regulator. It's a topical spot-on applied to the skin between the shoulder blades.
The advantage of Frontline is that it doesn't enter the bloodstream - it distributes through the oils in the skin and coat. This appeals to owners who prefer a non-systemic approach. The downside is that efficacy can be affected by bathing and swimming, and some dog owners have reported declining effectiveness against ticks in certain areas of South Africa.
For immediate flea knockdown - say your dog has picked up a heavy infestation - Capstar is useful. It contains nitenpyram, starts killing fleas within 30 minutes, and is out of the system within 24 hours. It's not a long-term prevention solution, but it's brilliant for acute situations.
Which One Should You Choose?
Honestly, you can't go badly wrong with any of the three main options. Here's my general guidance:
- Choose Bravecto if you want the least hassle. Four doses a year, effective coverage, done.
- Choose NexGard (or NexGard Spectra) if you want monthly dosing with the option to combine flea, tick, and worm protection in one product.
- Choose Simparica Trio if you've got a very small breed, want all-in-one parasite coverage, and prefer a monthly schedule.
The most important thing - and I can't stress this enough - is consistency. A missed dose is worse than choosing the "wrong" product. Ticks in South Africa carry babesiosis (biliary), which can kill a dog within days. Whatever product you pick, set a reminder and stick to the schedule.
If you're not sure which treatment suits your dog's weight, age, or health status, chat to your vet. And if you'd like to compare pricing or browse options, check out our flea and tick treatment range - we deliver nationwide and always keep popular sizes in stock.
