Allergic reaction after Pyrantel + Sarolaner (Simparica Trio) in dogs

569 reports to the FDA describe allergic reaction in dogs given Pyrantel + Sarolaner. That is 1.1% of all reports for this medicine, compared with 2.3% across reports for all dog medicines, so it is reported less often than average with this medicine.

569Reports
75%Marked serious
37%Recovered
3.3%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
357 65%
1–2 days
109 20%
3–7 days
31 5.6%
1–4 weeks
30 5.4%
Over a month
26 4.7%

How the animals did

Recovered
212 37%
Still unwell when reported
237 42%
Died
10 1.8%
Euthanised
9 1.6%
Not known
101 18%

Problems reported at the same time

191 34%
160 28%
137 24%
108 19%
99 17%
41 7.2%

Age of the animals

Under 1 year
120
1–3 years
229
4–7 years
128
8–11 years
55
12+ years
9

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 allergic reaction in dogs?
569 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 the same 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).

Allergic reaction with similar medicines

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