Lethargy after Fortiflora in dogs

The FDA has received 23 reports of lethargy in dogs after Fortiflora. That is 38% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

23Reports
78%Marked serious
4.3%Recovered
35%Died or euthanised
9 daysTypical onset
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How soon it started

Same day
5 23%
1–2 days
5 23%
3–7 days
0 0.0%
1–4 weeks
8 36%
Over a month
4 18%

How the animals did

Recovered
1 4.3%
Still unwell when reported
14 61%
Died
1 4.3%
Euthanised
7 30%

Problems reported at the same time

14 61%
12 52%
Kidney problems
9 39%
Death
8 35%
Liver problems
6 26%
Abnormal ultrasound finding
5 22%
Blood problems
5 22%

Age of the animals

Under 1 year
1
1–3 years
1
4–7 years
5
8–11 years
6
12+ years
10

About this medicine

Type: medicine.

Questions owners ask

Can Fortiflora cause lethargy in dogs?
23 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 9 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).

Lethargy with similar medicines

All reported side effects of Fortiflora in dogs · Medicines most reported with lethargy