Weight loss after Omeprazole in dogs

The FDA has received 97 reports of weight loss in dogs after Omeprazole. That is 10% of all reports for this medicine, compared with 1.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

97Reports
73%Marked serious
16%Recovered
23%Died or euthanised
14 daysTypical onset
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How soon it started

Same day
10 13%
1–2 days
7 9.3%
3–7 days
11 15%
1–4 weeks
19 25%
Over a month
28 37%

How the animals did

Recovered
14 14%
Recovered with lasting effects
2 2.1%
Still unwell when reported
51 53%
Died
8 8.2%
Euthanised
14 14%
Not known
8 8.2%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
11
4–7 years
25
8–11 years
43
12+ years
17

About this medicine

Type: medicine.

Questions owners ask

Can Omeprazole cause weight loss in dogs?
97 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 14 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).

Weight loss with similar medicines

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