Lethargy after Omeprazole in dogs

272 reports to the FDA describe lethargy in dogs given Omeprazole. That is 29% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

272Reports
77%Marked serious
15%Recovered
36%Died or euthanised
10 daysTypical onset
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How soon it started

Same day
42 18%
1–2 days
29 13%
3–7 days
35 15%
1–4 weeks
53 23%
Over a month
72 31%

How the animals did

Recovered
38 14%
Recovered with lasting effects
3 1.1%
Still unwell when reported
106 39%
Died
29 11%
Euthanised
68 25%
Not known
28 10%

Problems reported at the same time

Age of the animals

Under 1 year
9
1–3 years
44
4–7 years
80
8–11 years
85
12+ years
53

About this medicine

Type: medicine.

Questions owners ask

Can Omeprazole cause lethargy in dogs?
272 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).

Lethargy with similar medicines

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