Loss of appetite after Moxidectin + Pyrantel + Sarolaner (Simparica Trio) in dogs

111 reports to the FDA describe loss of appetite in dogs given Moxidectin + Pyrantel + Sarolaner. That is 9.6% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

111Reports
50%Marked serious
20%Recovered
16%Died or euthanised
50 daysTypical onset
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How soon it started

Same day
13 16%
1–2 days
8 10%
3–7 days
4 5.0%
1–4 weeks
9 11%
Over a month
46 57%

How the animals did

Recovered
22 20%
Still unwell when reported
40 36%
Died
7 6.3%
Euthanised
11 9.9%
Not known
31 28%

Problems reported at the same time

Age of the animals

Under 1 year
12
1–3 years
27
4–7 years
28
8–11 years
32
12+ years
12

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 loss of appetite in dogs?
111 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 50 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).

Loss of appetite with similar medicines

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