Vomiting after Moxidectin + Pyrantel + Sarolaner (Simparica Trio) in dogs

197 reports to the FDA describe vomiting in dogs given Moxidectin + Pyrantel + Sarolaner. That is 17% of all reports for this medicine, compared with 28% across reports for all dog medicines, so it is reported less often than average with this medicine.

197Reports
28%Marked serious
40%Recovered
8.1%Died or euthanised
27 daysTypical onset
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How soon it started

Same day
38 24%
1–2 days
12 7.5%
3–7 days
8 5.0%
1–4 weeks
25 16%
Over a month
78 48%

How the animals did

Recovered
77 39%
Recovered with lasting effects
2 1.0%
Still unwell when reported
40 20%
Died
5 2.5%
Euthanised
11 5.6%
Not known
62 31%

Problems reported at the same time

60 30%
57 29%
16 8.1%
Dehydration
13 6.6%

Age of the animals

Under 1 year
44
1–3 years
57
4–7 years
39
8–11 years
30
12+ years
21

About this medicine

Moxidectin prevents heartworm disease (monthly topical, or a 6- or 12-month injection for dogs). Pyrantel treats roundworms and hookworms. Sarolaner kills fleas, ticks and some mites; monthly.

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

Some herding breeds (for example Collies) carry the MDR1 gene variant and can be more sensitive to this drug class at high doses.

Questions owners ask

Can Moxidectin + Pyrantel + Sarolaner cause vomiting in dogs?
197 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 27 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).

Vomiting with similar medicines

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