Weakness after Pyrantel + Sarolaner (Simparica Trio) in dogs

352 reports to the FDA describe weakness in dogs given Pyrantel + Sarolaner. That is 0.7% of all reports for this medicine, compared with 1.4% across reports for all dog medicines, so it is reported less often than average with this medicine.

352Reports
72%Marked serious
22%Recovered
17%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
122 37%
1–2 days
67 20%
3–7 days
45 14%
1–4 weeks
53 16%
Over a month
43 13%

How the animals did

Recovered
78 22%
Still unwell when reported
169 48%
Died
20 5.7%
Euthanised
40 11%
Not known
45 13%

Problems reported at the same time

Age of the animals

Under 1 year
56
1–3 years
76
4–7 years
62
8–11 years
89
12+ years
58

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.

Questions owners ask

Can Pyrantel + Sarolaner cause weakness in dogs?
352 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?
In half of the reports with dates, it started within 1 day of the first dose.
What should I do?
Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Weakness with similar medicines

All reported side effects of Pyrantel + Sarolaner in dogs · Medicines most reported with weakness