Pyrantel + Sarolaner (Simparica Trio) side effects in dogs

53,360 reports sent to the FDA between 2020 and 2026 involve Pyrantel + Sarolaner in dogs. The most reported problems were vomiting, seizures, diarrhea. 56% were marked serious, and where it was recorded, signs eased after stopping the medicine in 27% of cases.

53,360Reports
56%Marked serious
85%Only medicine involved
19%Recovered
1.7%Died or euthanised
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About this medicine

Pyrantel treats roundworms and hookworms. Sarolaner kills fleas, ticks and some mites; monthly.

Products with this combination include Simparica Trio (which also contains moxidectin). The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Most reported side effects

10,822 20%
4,687 8.8%
4,331 8.1%
3,702 6.9%
2,595 4.9%
1,535 2.9%

Share = percentage of this medicine's reports that mention the problem. One report can list several problems.

Reports that it didn't work

Some reports are about the medicine not working (for example a dog still getting fleas or heartworm), not about a side effect.

How soon problems started

Same day
14,823 38%
1–2 days
4,455 11%
3–7 days
1,962 5.0%
1–4 weeks
3,321 8.5%
Over a month
14,476 37%

Time from the first dose to the first sign, where both dates were reported (39,037 reports).

How the animals did

Recovered
10,152 19%
Recovered with lasting effects
11 0.0%
Still unwell when reported
32,415 61%
Died
498 0.9%
Euthanised
422 0.8%
Not known
9,862 18%

Breeds named most often

Popular breeds appear more often because there are more of them.

Other dewormers for dogs