Eye disorder (for photophobia see 'neurological') after Spinosad (Comfortis) in dogs

174 reports to the FDA describe eye disorder (for photophobia see 'neurological') in dogs given Spinosad. That is 0.3% of all reports for this medicine, compared with 0.2% across reports for all dog medicines.

174Reports
43%Marked serious
48%Recovered
7.5%Died or euthanised
3 daysTypical onset
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How soon it started

Same day
46 41%
1–2 days
9 8.1%
3–7 days
5 4.5%
1–4 weeks
10 9.0%
Over a month
41 37%

How the animals did

Recovered
45 26%
Recovered with lasting effects
39 22%
Still unwell when reported
22 13%
Died
5 2.9%
Euthanised
8 4.6%
Not known
55 32%

Problems reported at the same time

Age of the animals

Under 1 year
20
1–3 years
51
4–7 years
48
8–11 years
34
12+ years
16

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 eye disorder (for photophobia see 'neurological') in dogs?
174 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 3 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).

Eye disorder (for photophobia see 'neurological') with similar medicines

All reported side effects of Spinosad in dogs · Medicines most reported with eye disorder (for photophobia see 'neurological')