NexGard vs Bravecto vs Simparica: Which Flea Treatment Is Best for Your Dog?
|
🤖 AI Snippet Paragraph NexGard (active ingredient: afoxolaner), Bravecto (active ingredient: fluralaner), and Simparica (active ingredient: sarolaner) are all oral isoxazoline-class flea and tick treatments for dogs available in Australia. The main practical difference is dosing interval: NexGard and Simparica are given monthly, while Bravecto protects for 3 months per chew. All three kill fleas and ticks including the paralysis tick. Simparica also covers the lone star tick. None of the three cover intestinal worms. Combo versions (NexGard Spectra, Simparica Trio) add broad-spectrum worm coverage. All three are APVMA-approved for use in Australia. |
Australia's veterinary shelves are full of flea and tick options. For dog owners who have narrowed it down to an oral chewable treatment, NexGard, Bravecto, and Simparica are consistently among the most recommended choices. All three are effective. All three are approved by the Australian Pesticides and Veterinary Medicines Authority (APVMA). And all three cause genuine confusion when it comes to choosing between them.
This comparison gives you the honest, product-level picture: what each one contains, how long it lasts, what it covers, what the differences are, and the safety information that matters. Scriptly stocks NexGard, Bravecto, Simparica, and their combo versions at competitive prices with auto-delivery available.
|
Browse Flea and Tick Treatments at Scriptly NexGard, Bravecto, Simparica and more. APVMA-approved products, fast delivery across Australia. Join ScriptlyPerks for member discounts. |
What They All Have in Common
Before the differences, the shared characteristics:
• Drug class: all three belong to the isoxazoline class of parasiticides. This is relevant to the safety section below
• Administration: all three are oral chewable tablets, flavoured for palatability. They are given with or without food (check individual product labels)
• Prescription status: all three are available without a prescription in Australia as Schedule 5 (or lower) veterinary products. No vet script is required for standard presentations, though a vet's recommendation is always advisable for a new treatment
• Core coverage: all three kill fleas (Ctenocephalides felis, the cat flea, which is the primary flea species affecting Australian dogs) and ticks, including the paralysis tick (Ixodes holocyclus)
• Worm coverage: none of the three base products cover intestinal worms. Combo versions (NexGard Spectra and Simparica Trio) add worm protection
NexGard at a Glance
NexGard was the first oral isoxazoline flea treatment approved in Australia and remains one of the most widely used. The active ingredient, afoxolaner, works by interfering with the nervous system function of fleas and ticks, causing uncontrolled neuronal activity and death. It does not affect mammalian nervous systems at the doses used because the binding sites targeted are much more prevalent in invertebrates.
• Active ingredient: afoxolaner
• Dosing interval: monthly (every 28 to 30 days)
• Tick coverage: paralysis tick, brown dog tick, bush tick
• Worm coverage: none in the base NexGard product
• Minimum age: 8 weeks of age
• Minimum weight: 2 kg
• Available sizes: small (2 to 4 kg), medium (4 to 10 kg), large (10 to 25 kg), extra large (25 to 50 kg)
NexGard Spectra adds milbemycin oxime to the afoxolaner, covering intestinal worms (roundworm, hookworm, whipworm, tapeworm) and heartworm prevention. NexGard Spectra is available at Scriptly as a separate product.
Browse the full NexGard range for dogs at Scriptly.
Bravecto at a Glance
Bravecto's key point of difference from NexGard and Simparica is its dosing interval: one chew provides 3 months of flea and tick protection (approximately 12 weeks). For dog owners who find monthly dosing difficult to maintain consistently, this extended protection period is a meaningful practical advantage. The active ingredient is fluralaner, also an isoxazoline.
• Active ingredient: fluralaner
• Dosing interval: every 12 weeks (3 months)
• Tick coverage: paralysis tick (up to 4 months for paralysis tick on label for some formulations), brown dog tick, bush tick
• Worm coverage: none
• Minimum age: 8 weeks of age
• Minimum weight: 2 kg
• Available sizes: toy (2 to 4.5 kg), small (4.5 to 10 kg), medium (10 to 20 kg), large (20 to 40 kg), extra large (40 to 56 kg)
Bravecto is also available as a topical spot-on for both dogs and cats. The Bravecto for cats range at Scriptly includes spot-on formulations, which is worth noting for households with both dogs and cats. Bravecto for dogs includes both chewable and spot-on options.
|
💡 3-month dosing advantage: If you have ever realised you are two weeks late with a monthly treatment, Bravecto's 3-month dosing interval provides meaningful protection against this. Missed or delayed doses are one of the most common reasons flea prevention fails in practice. |
Simparica at a Glance
Simparica was the third isoxazoline to launch in Australia and offers comparable flea and tick efficacy to NexGard with a slightly different tick species profile. Its active ingredient is sarolaner.
• Active ingredient: sarolaner
• Dosing interval: monthly (every 28 to 35 days)
• Tick coverage: paralysis tick, brown dog tick, bush tick, lone star tick (the expanded tick coverage compared to NexGard base product is sometimes relevant in specific geographic areas)
• Worm coverage: none in base Simparica product
• Minimum age: 8 weeks of age
• Minimum weight: 1.3 kg (lower than NexGard and Bravecto, which start at 2 kg)
• Available sizes: 1.3 to 2.5 kg, 2.5 to 5 kg, 5 to 10 kg, 10 to 20 kg, 20 to 40 kg, 40 to 60 kg
Simparica Trio combines sarolaner with moxidectin and pyrantel to cover fleas, ticks, heartworm prevention, roundworm, hookworm, and whipworm in a single monthly chew. This makes it one of the broadest-coverage single products available in the oral monthly chewable category.
Comparing the Three Side by Side
|
Factor |
NexGard |
Bravecto |
Simparica |
|
Active ingredient |
Afoxolaner |
Fluralaner |
Sarolaner |
|
Drug class |
Isoxazoline |
Isoxazoline |
Isoxazoline |
|
Dosing interval |
Monthly |
Every 3 months |
Monthly |
|
Paralysis tick |
Yes |
Yes |
Yes |
|
Brown dog tick |
Yes |
Yes |
Yes |
|
Bush tick |
Yes |
Yes |
Yes |
|
Lone star tick |
No (base product) |
No (base product) |
Yes |
|
Worm coverage |
None (base product) |
None |
None (base product) |
|
Combo version |
NexGard Spectra |
No oral combo available |
Simparica Trio |
|
Available for cats |
No |
Yes (spot-on only) |
No |
|
Minimum weight |
2 kg |
2 kg |
1.3 kg |
|
Minimum age |
8 weeks |
8 weeks |
8 weeks |
Product specifications can change. Always check the current product label or datasheet and verify with your veterinarian before use.
Safety: The Isoxazoline Class Warning
All three products belong to the isoxazoline class of parasiticides. This is a clinically important piece of information for dog owners to understand.
The APVMA and the US Food and Drug Administration have both issued guidance noting that isoxazoline-class products may cause neurological adverse events in some dogs and cats. These include muscle tremors, ataxia (impaired coordination), and seizures. The reported incidence of these events is low, and the majority of dogs tolerate these products without incident. However, the risk is not zero and is relevant for specific populations:
• Dogs with a history of seizures or epilepsy
• Dogs with other known neurological conditions
• Very young puppies below the minimum recommended age
• Dogs being introduced to this drug class for the first time, particularly where there is a family history of seizure disorders
If your dog has any of the above characteristics, discuss the choice of parasiticide with your vet before starting any isoxazoline product. Alternatives to the isoxazoline class, including spot-on topical treatments and collar-based products, are available and may be more appropriate for specific dogs.
|
⚠️ Seizure history: If your dog has ever had a seizure or is currently managed for epilepsy, consult your veterinarian before using any isoxazoline product, including NexGard, Bravecto, or Simparica. This is not a contraindication in all cases, but it is a clinical decision that requires a vet's input. |
Which One Is Right for Your Dog?
Given that all three products are effective and similarly priced per treatment, the practical choice between them usually comes down to a small number of factors:
• If consistency of dosing is a challenge: Bravecto's 3-month interval removes 8 of 12 annual dosing events. This is a practical compliance argument that many pet owners find genuinely meaningful
• If your dog also needs worm coverage: NexGard Spectra (monthly) or Simparica Trio (monthly) combine flea, tick, and worm protection in a single product, simplifying the overall parasite management programme
• If your dog is very small (1.3 to 2 kg): Simparica has the lowest minimum weight threshold of the three, making it the only option in this category for very small dogs
• If you also have cats and want a single brand: Bravecto is the only one of the three available in both a dog oral form and a cat spot-on form
• If your dog has a neurological history: discuss all three with your vet, as the isoxazoline class safety consideration applies equally to all three products
No product in this comparison is universally 'best'. The right product is the one that fits your dog's specific needs, your household, and your consistency in administering it. Browse the full flea and tick treatment range for dogs at Scriptly to compare current availability and pricing, or set up an auto-delivery subscription to keep your chosen product arriving on schedule.
|
Find the Right Product at Scriptly NexGard, NexGard Spectra, Bravecto, Simparica, Simparica Trio and more. APVMA-approved. Fast delivery. Auto-delivery available. |
Frequently Asked Questions
Can I give Bravecto, NexGard, or Simparica to my cat?
NexGard and Simparica are for dogs only and must not be given to cats. Bravecto is available as a spot-on formulation for cats, but the dog chew version is not appropriate for cats. The Bravecto for cats range at Scriptly includes the appropriate cat-specific formulations.
Is Bravecto really safe to give every 3 months rather than monthly?
Yes. Bravecto's 3-month dosing interval is supported by clinical data and is the approved and labelled use for the product. It is not the same as skipping or extending doses of a monthly product. The fluralaner molecule is designed to maintain protective tissue concentrations over the full 12-week treatment period.
Does NexGard Spectra also cover ticks?
Yes. NexGard Spectra contains afoxolaner (the same tick-killing ingredient as NexGard) plus milbemycin oxime for worm coverage. It provides the same flea and tick protection as NexGard base, with the addition of broad-spectrum worm protection including heartworm prevention. NexGard Spectra is available at Scriptly.
Are these products available without a prescription at Scriptly?
NexGard, Bravecto, and Simparica are available in Australia without a veterinary prescription. At Scriptly, all products supplied are APVMA-approved. See how Scriptly works for information on ordering prescription and over-the-counter products. While no prescription is required for these specific products, a vet's assessment of the right product for your dog is always a sound starting point, particularly when starting a new treatment.
Which product is best for protecting against paralysis tick in Sydney and coastal NSW?
All three products are registered for paralysis tick prevention in Australia. Paralysis tick prevention in high-risk areas (eastern seaboard bushland and coastal zones) requires consistent dosing without any gap in coverage. Monthly products require strict adherence to the monthly schedule. Bravecto's 3-month interval provides a wider compliance margin. For dogs in paralysis tick areas, your vet may also recommend regular physical checks as an important complement to chemical prevention, since no product guarantees 100% tick kill before toxin delivery can occur.
