Horizontal nystagmus after Florfenicol + Mometasone + Terbinafine in dogs

78 reports to the FDA describe horizontal nystagmus in dogs given Florfenicol + Mometasone + Terbinafine. That is 2.2% 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.

78Reports

68%Marked serious

23%Recovered

7.7%Died or euthanised

Same dayTypical onset

How soon it started

Same day

52 68%

1–2 days

10 13%

3–7 days

3 3.9%

1–4 weeks

8 10%

Over a month

4 5.2%

How the animals did

Recovered

18 23%

Still unwell when reported

25 32%

Died

1 1.3%

Euthanised

5 6.4%

Not known

29 37%

Problems reported at the same time

Head tilt - ear disorder

39 50%

37 47%

24 31%

24 31%

18 23%

Head tilt - neurological disorder

17 22%

Lethargy

12 15%

Behaviour change

10 13%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: medicine.

Questions owners ask

Can Florfenicol + Mometasone + Terbinafine cause horizontal nystagmus in dogs?: 78 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 the same day 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 Florfenicol + Mometasone + Terbinafine in dogs · Medicines most reported with horizontal nystagmus