Dehydration after Pyrantel + Sarolaner (Simparica Trio) in dogs

212 reports to the FDA describe dehydration in dogs given Pyrantel + Sarolaner. That is 0.4% of all reports for this medicine, compared with 0.7% across reports for all dog medicines, so it is reported less often than average with this medicine.

212Reports
89%Marked serious
23%Recovered
13%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
87 43%
1–2 days
56 28%
3–7 days
20 9.9%
1–4 weeks
27 13%
Over a month
13 6.4%

How the animals did

Recovered
48 23%
Still unwell when reported
117 55%
Died
13 6.1%
Euthanised
15 7.1%
Not known
19 9.0%

Problems reported at the same time

142 67%
109 51%
91 43%
37 17%
29 14%
29 14%

Age of the animals

Under 1 year
48
1–3 years
68
4–7 years
40
8–11 years
37
12+ years
15

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 dehydration in dogs?
212 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).

Dehydration with similar medicines

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