Quick Verdict
Simparica Trio earns its premium price if your dog needs heartworm prevention anyway. Combining three treatments into one monthly tablet is genuinely convenient and cheaper than buying each separately. The isoxazoline class advisory applies here too — check your dog's seizure history before starting.
Quick Answers
- One tablet covers: fleas, ticks, heartworm, roundworm and hookworm
- Active ingredients: sarolaner (isoxazoline) + moxidectin + pyrantel
- ⚠️ Isoxazoline class — use with caution in dogs with seizure history
- Best price: Canada Pet Care $115-135/6-pack vs $175-210 at US vets
- Minimum age: 8 weeks, minimum weight: 2.8 lbs
In This Article
Affiliate disclosure: ReviewPooch earns commission on purchases made through links in this article, at no cost to you.
Is the three-in-one tablet actually worth it?
Most dog owners on monthly flea and tick prevention are also on monthly heartworm prevention. Two products, two doses, two costs. Simparica Trio is one tablet that covers both — plus deworming for roundworm and hookworm on top of that.
The maths on whether it saves money are straightforward. If you're currently buying NexGard plus Heartgard separately, price them out. Simparica Trio will usually cost the same or slightly less, with the added benefit of one fewer thing to remember each month.
What's in it
Three active ingredients:
- Sarolaner — isoxazoline class, kills fleas and ticks by overstimulating their nervous systems after they bite
- Moxidectin — prevents heartworm and kills hookworms
- Pyrantel pamoate — treats roundworm and hookworm infections
All three absorb systemically, which is how one tablet covers both external and internal parasites. It also means it requires a prescription in the US — same as NexGard and Bravecto.
Efficacy
From Zoetis FDA submissions:
- Fleas: 96.9% reduction within 8 hours of first dose
- Deer tick (Ixodes scapularis): 100% within 24 hours
- American dog tick: 100% within 48 hours
- Heartworm prevention: 100% in controlled trials
- Roundworm: 98.7% reduction
Flea kill starts at 8 hours — slightly slower than NexGard's 4 hours, but both clear infestations within the same monthly window.
⚠️ The isoxazoline warning
Sarolaner belongs to the isoxazoline class covered by the FDA's 2018 advisory. Documented adverse reactions: tremors, ataxia, and seizures, primarily in dogs with pre-existing neurological conditions.
Required label language: "Use with caution in animals with a history of neurologic disorders such as epilepsy."
For healthy dogs the rate of these reactions is low. If your dog has a seizure history, the non-isoxazoline alternatives for flea and tick coverage are Frontline Plus and Seresto collar — though neither covers heartworm, which would still need a separate product.
The actual cost comparison
Against buying flea/tick and heartworm prevention separately at Canada Pet Care:
- NexGard 6-pack + Heartgard Plus 6-pack: $70-85 + $35-50 = $105-135
- Simparica Trio 6-pack: $115-135
Similar cost, one fewer tablet. The convenience is genuine — not a marketing claim.
Where to buy without a prescription
US vet clinics charge $175-210 for a Simparica Trio 6-pack. Canada Pet Care sources the same Zoetis product from licensed international pharmacies at $115-135. Same product, 7-10 day shipping, free over $49.
Frequently asked questions
Does Simparica Trio replace Heartgard?
Yes. Once you're on Simparica Trio you don't need a separate heartworm preventative. The moxidectin component does the same job.
Can it be given to puppies?
Approved from 8 weeks, minimum 2.8 lbs. Weight-appropriate doses available at Canada Pet Care.
Does it need to be given year-round?
For heartworm prevention, yes — gaps in coverage create infection risk. Year-round continuous dosing is the standard recommendation.
Buy Simparica Trio at Canada Pet Care →Pros & Cons
Pros
- Three-in-one convenience — flea, tick, heartworm, roundworm, hookworm
- Often cheaper than buying flea/tick + heartworm separately
- One fewer tablet per month
- FDA-approved efficacy data across all covered parasites
Cons
- ⚠️ Isoxazoline class — caution in seizure-history dogs
- Higher per-tablet cost than flea-only options
- Slightly slower flea kill than NexGard (8h vs 4h)
- Prescription required in US
Comparison Table
| Product | Covers | Monthly cost | Isoxazoline | Score |
|---|---|---|---|---|
| Simparica Trio | Fleas+Ticks+HW+Worms | $19-22 | Yes | 8.7 |
| NexGard+Heartgard | Fleas+Ticks+HW | $17-22 | Yes (NexGard) | 8.5 |
| Bravecto+Heartgard | Fleas+Ticks+HW | $14-19 | Yes (Bravecto) | 8.6 |
| Frontline+Heartgard | Fleas+Ticks+HW | $14-18 | No | 7.8 |
Bottom Line
If you already pay for monthly heartworm prevention plus flea and tick protection, Simparica Trio consolidates the cost. Canada Pet Care prices a 6-pack at $115-135 — $40-75 less than US vet clinics for the same Zoetis product.