Diarrhea after Fish Oil in dogs

167 reports to the FDA describe diarrhea in dogs given Fish Oil. That is 11% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

167Reports
46%Marked serious
42%Recovered
9.6%Died or euthanised
19 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
21 19%
1–2 days
9 8.0%
3–7 days
14 12%
1–4 weeks
17 15%
Over a month
52 46%

How the animals did

Recovered
68 41%
Recovered with lasting effects
2 1.2%
Still unwell when reported
42 25%
Died
3 1.8%
Euthanised
13 7.8%
Not known
39 23%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
23
4–7 years
36
8–11 years
56
12+ years
46

About this medicine

Type: medicine.

Questions owners ask

Can Fish Oil cause diarrhea in dogs?
167 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 19 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).

Diarrhea with similar medicines

All reported side effects of Fish Oil in dogs · Medicines most reported with diarrhea