Behaviour change after Omeprazole in dogs

59 reports to the FDA describe behaviour change in dogs given Omeprazole. That is 6.2% of all reports for this medicine, compared with 2.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

59Reports
85%Marked serious
25%Recovered
25%Died or euthanised
11 daysTypical onset
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How soon it started

Same day
7 13%
1–2 days
7 13%
3–7 days
6 12%
1–4 weeks
16 31%
Over a month
16 31%

How the animals did

Recovered
14 24%
Recovered with lasting effects
1 1.7%
Still unwell when reported
22 37%
Died
6 10%
Euthanised
9 15%
Not known
7 12%

Problems reported at the same time

Age of the animals

Under 1 year
2
1–3 years
17
4–7 years
12
8–11 years
16
12+ years
12

About this medicine

Type: medicine.

Questions owners ask

Can Omeprazole cause behaviour change in dogs?
59 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 11 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).

Behaviour change with similar medicines

All reported side effects of Omeprazole in dogs · Medicines most reported with behaviour change