Blood problems after Pyrantel + Sarolaner (Simparica Trio) in dogs

335 reports to the FDA describe blood problems in dogs given Pyrantel + Sarolaner. That is 0.6% of all reports for this medicine, compared with 1.8% across reports for all dog medicines, so it is reported less often than average with this medicine.

335Reports
93%Marked serious
6.9%Recovered
20%Died or euthanised
6 daysTypical onset
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How soon it started

Same day
55 19%
1–2 days
64 22%
3–7 days
38 13%
1–4 weeks
70 24%
Over a month
64 22%

How the animals did

Recovered
23 6.9%
Still unwell when reported
225 67%
Died
18 5.4%
Euthanised
50 15%
Not known
19 5.7%

Problems reported at the same time

Age of the animals

Under 1 year
81
1–3 years
64
4–7 years
77
8–11 years
72
12+ years
34

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 blood problems in dogs?
335 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 6 days 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).

Blood problems with similar medicines

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