Horizontal nystagmus after Bedinvetmab (Librela) in dogs

98 reports to the FDA describe horizontal nystagmus in dogs given Bedinvetmab. That is 0.5% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

98Reports

78%Marked serious

15%Recovered

19%Died or euthanised

10 daysTypical onset

How soon it started

Same day

16 18%

1–2 days

6 6.8%

3–7 days

21 24%

1–4 weeks

18 20%

Over a month

27 31%

How the animals did

Recovered

15 15%

Still unwell when reported

60 61%

Died

2 2.0%

Euthanised

17 17%

Not known

4 4.1%

Problems reported at the same time

Head tilt - neurological disorder

44 45%

32 33%

30 31%

29 30%

24 24%

19 19%

13 13%

12 12%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Bedinvetmab reduces osteoarthritis pain in dogs (monthly injection).

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

Questions owners ask

Can Bedinvetmab cause horizontal nystagmus in dogs?: 98 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 10 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).

All reported side effects of Bedinvetmab in dogs · Medicines most reported with horizontal nystagmus