Inappropriate urination after Pyrantel + Sarolaner (Simparica Trio) in dogs

The FDA has received 247 reports of inappropriate urination in dogs after Pyrantel + Sarolaner. That is 0.5% of all reports for this medicine, compared with 0.5% across reports for all dog medicines.

247Reports
54%Marked serious
26%Recovered
6.1%Died or euthanised
1 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
105 45%
1–2 days
65 28%
3–7 days
15 6.4%
1–4 weeks
30 13%
Over a month
18 7.7%

How the animals did

Recovered
63 26%
Still unwell when reported
109 44%
Died
6 2.4%
Euthanised
9 3.6%
Not known
60 24%

Problems reported at the same time

Age of the animals

Under 1 year
76
1–3 years
44
4–7 years
36
8–11 years
51
12+ years
33

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 inappropriate urination in dogs?
247 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).

Inappropriate urination with similar medicines

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