Health guide
Flea, Tick & Worm Treatment Guide for Australian Dogs
Which treatments work, how often to apply them, and the brands Aussie vets recommend.
7 min read
The quick answer
- 1Paralysis ticks kill dogs within 24–48 hours of symptoms — tick prevention is not optional if you live on the east coast
- 2Monthly all-in-one chews like NexGard Spectra cover fleas, paralysis ticks, heartworm, and intestinal worms in one dose
- 3Seasonal risk is highest October–April in eastern Australia — but fleas and heartworm are year-round threats across all of Australia
When to see a vet
Australia has some of the most dangerous parasites in the world for dogs. Paralysis ticks kill thousands of dogs every year, heartworm destroys a dog's heart over months without visible symptoms, and fleas trigger severe allergic reactions. Modern preventatives make all of this manageable — but only if you use the right products consistently.
Part 1
The Australian Parasite Calendar
Paralysis tick (Ixodes holocyclus)
- Peak risk period
- Sep–Apr (year-round in QLD)
- High-risk regions
- East coast QLD, NSW, VIC
- Can kill?
- ✅ Yes — within 48 hours
Brown dog tick
- Peak risk period
- Year-round
- High-risk regions
- All of Australia
- Can kill?
- ⚠️ Rarely, indirectly
Fleas
- Peak risk period
- Year-round (worse in summer)
- High-risk regions
- All of Australia
- Can kill?
- ⚠️ Via allergy/anaemia
Heartworm
- Peak risk period
- Year-round
- High-risk regions
- Northern Australia especially
- Can kill?
- ✅ Yes — over months
Intestinal worms
- Peak risk period
- Year-round
- High-risk regions
- All of Australia
- Can kill?
- ⚠️ In puppies, yes
| Parasite | Peak risk period | High-risk regions | Can kill? |
|---|---|---|---|
| Paralysis tick (Ixodes holocyclus) | Sep–Apr (year-round in QLD) | East coast QLD, NSW, VIC | ✅ Yes — within 48 hours |
| Brown dog tick | Year-round | All of Australia | ⚠️ Rarely, indirectly |
| Fleas | Year-round (worse in summer) | All of Australia | ⚠️ Via allergy/anaemia |
| Heartworm | Year-round | Northern Australia especially | ✅ Yes — over months |
| Intestinal worms | Year-round | All of Australia | ⚠️ In puppies, yes |
Part 2
Paralysis Ticks — The Biggest Threat on the East Coast
- 🟥 Very High Risk Zones
- Coastal QLD and NSW within 20 km of bushland — Brisbane suburbs, Sydney beaches, Sunshine Coast, Byron Bay
- 🟧 High Risk
- Sub-coastal areas of QLD and NSW, rural properties near scrub or national parks
- 🟨 Moderate Risk
- Urban Sydney and Brisbane areas with bushland reserves nearby
- 🟩 Low/No Risk
- Victoria, SA, WA, NT, Tasmania — paralysis ticks don't occur in these states
Part 3
Which Treatment Should You Use?
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The shift to monthly oral chews has been the biggest improvement in parasite prevention in a decade. They can't wash off, are more reliable than spot-on treatments, and the best products cover all major parasites in a single dose.
NexGard Spectra
- Form
- Oral chew
- Covers
- Fleas, all ticks incl. paralysis, heartworm, intestinal worms
- Frequency
- Monthly
Simparica Trio
- Form
- Oral chew
- Covers
- Fleas, all ticks incl. paralysis, heartworm, intestinal worms
- Frequency
- Monthly
Bravecto
- Form
- Oral chew or spot-on
- Covers
- Fleas + ticks (NOT heartworm or intestinal worms)
- Frequency
- 3 months
Interceptor Plus
- Form
- Oral chew
- Covers
- Heartworm + intestinal worms (NOT fleas or ticks)
- Frequency
- Monthly
Seresto collar
- Form
- Collar
- Covers
- Fleas + ticks (NOT heartworm or worms)
- Frequency
- 8 months
| Product | Form | Covers | Frequency |
|---|---|---|---|
| NexGard Spectra | Oral chew | Fleas, all ticks incl. paralysis, heartworm, intestinal worms | Monthly |
| Simparica Trio | Oral chew | Fleas, all ticks incl. paralysis, heartworm, intestinal worms | Monthly |
| Bravecto | Oral chew or spot-on | Fleas + ticks (NOT heartworm or intestinal worms) | 3 months |
| Interceptor Plus | Oral chew | Heartworm + intestinal worms (NOT fleas or ticks) | Monthly |
| Seresto collar | Collar | Fleas + ticks (NOT heartworm or worms) | 8 months |
Vet's #1 Choice
NexGard Spectra
Australia's most commonly vet-recommended all-in-one parasite chew. One monthly tablet covers fleas, paralysis ticks, heartworm, and intestinal worms. Beef-flavoured — most dogs take it like a treat.
- Fleas, paralysis ticks, heartworm + intestinal worms in one dose
- Beef-flavoured chew — no hiding in food required
- Available in 4 weight-based sizes
- Kills ticks within 24 hours of attachment
8-Month Coverage
Seresto Flea & Tick Collar
8-month continuous protection for dogs that resist tablets. Water-resistant and odourless. Covers fleas and ticks but needs a separate heartworm and worm treatment — best paired with a quarterly all-wormer.
- 8 months of continuous flea and tick protection
- Water-resistant — safe for swimming dogs
- Pair with an all-wormer for complete coverage
- Odourless and non-greasy
Part 4
Daily Tick Check Routine — Prevention Isn't Enough
Affiliate Disclosure: As an Amazon Associate I earn from qualifying purchases. Product links on this page go to Amazon AU. Prices shown are approximate, check Amazon for current pricing.
Vet Recommended
O'Tom Tick Remover Hook Set
Vet-recommended tick removal tool. A proper hook removes the whole tick without squeezing the body — squeezing injects more toxin into your dog. Essential kit for anyone in tick-prone areas.
- Removes tick whole without squeezing body
- Includes 2 sizes for different tick sizes
- Safer than tweezers
- Essential in bushland or coastal areas
Part 5
Heartworm — The Silent Killer
- 🦟 How it spreads
- Transmitted by mosquitoes — even indoor dogs in mosquito-prone areas are at risk
- 📍 Highest risk
- Northern Australia (Darwin, Cairns, Townsville) — year-round. All of Australia is at risk
- 🔇 Symptoms
- None until advanced — coughing, fatigue, weight loss appear months or years after infection
- 💊 Prevention
- Monthly heartworm prevention (NexGard Spectra, Simparica Trio) or annual injection from your vet
- 💸 Treatment cost
- $1,000–3,000+ for treatment of established heartworm — prevention costs ~$25/month
Common questions
What is the best tick prevention for dogs in Australia?
NexGard Spectra and Simparica Trio are the most commonly recommended by Australian vets for comprehensive coverage including paralysis ticks. Both are monthly oral chews. Always check the product label confirms paralysis tick (Ixodes holocyclus) coverage — not all tick products cover this species.
Can I use human flea treatment on my dog?
No. Human treatments are not formulated for dogs and can cause serious adverse reactions. Never use cat flea treatments on dogs either — products containing permethrin are safe for dogs but highly toxic to cats.
How do I remove a tick safely?
Use a tick removal hook (like O'Tom). Grasp the tick as close to the skin as possible and pull upward with steady, even pressure. Never twist, crush, burn, or apply Vaseline — these cause the tick to inject more toxin. After removal, call your vet even if your dog seems fine.
Does my indoor dog need flea and tick treatment?
Fleas: yes. Fleas enter homes on clothing, other animals, and through gaps in doors. An untreated indoor dog can develop a severe infestation quickly. Paralysis ticks: only if your dog ever goes outside in tick-prone areas, even briefly.
My dog is on prevention — do I still need to check for ticks?
Yes, daily. No product provides 100% instant protection. Prevention products kill ticks after attachment — but there's a window where a tick can inject toxin before dying. Daily checks during September–May (in NSW/QLD) remain essential even on prevention.
Can I buy NexGard without a prescription in Australia?
NexGard Spectra is prescription-only in Australia. Your vet will prescribe it at your dog's annual health check. Some variations of plain NexGard (flea/tick only) may be available OTC, but for the full spectrum product, a vet prescription is required.