Drinking a lot after Spinosad (Comfortis) in dogs

104 reports to the FDA describe drinking a lot in dogs given Spinosad. That is 0.2% of all reports for this medicine, compared with 0.2% across reports for all dog medicines.

104Reports
40%Marked serious
46%Recovered
13%Died or euthanised
2 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
29 40%
1–2 days
9 12%
3–7 days
6 8.2%
1–4 weeks
5 6.8%
Over a month
24 33%

How the animals did

Recovered
29 28%
Recovered with lasting effects
19 18%
Still unwell when reported
20 19%
Died
8 7.7%
Euthanised
5 4.8%
Not known
23 22%

Problems reported at the same time

Age of the animals

Under 1 year
4
1–3 years
19
4–7 years
33
8–11 years
28
12+ years
17

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 drinking a lot in dogs?
104 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 2 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).

Drinking a lot with similar medicines

All reported side effects of Spinosad in dogs · Medicines most reported with drinking a lot