Elevated amylase after Spinosad (Comfortis) in dogs

70 reports to the FDA describe elevated amylase in dogs given Spinosad. That is 0.1% of all reports for this medicine, compared with 0.3% across reports for all dog medicines, so it is reported less often than average with this medicine.

70Reports

41%Marked serious

11%Recovered

24%Died or euthanised

23 daysTypical onset

How soon it started

Same day

6 38%

1–2 days

1 6.3%

3–7 days

1 6.3%

1–4 weeks

2 13%

Over a month

6 38%

How the animals did

Recovered

4 5.7%

Recovered with lasting effects

4 5.7%

Still unwell when reported

9 13%

Died

8 11%

Euthanised

9 13%

Not known

36 51%

Problems reported at the same time

44 63%

43 61%

37 53%

33 47%

27 39%

22 31%

21 30%

19 27%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Spinosad kills fleas; monthly chewable.

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

Questions owners ask

Can Spinosad cause elevated amylase in dogs?: 70 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 23 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).

Elevated amylase with similar medicines

Elevated amylase after Lufenuron + Milbemycin Oxime (Sentinel) 26 reports · 0.1% of its reports

All reported side effects of Spinosad in dogs · Medicines most reported with elevated amylase