Lethargy after Hydrocodone in dogs

The FDA has received 51 reports of lethargy in dogs after Hydrocodone. That is 19% of all reports for this medicine, compared with 11% across reports for all dog medicines, so it is reported unusually often with this medicine.

51Reports
69%Marked serious
22%Recovered
33%Died or euthanised
24 daysTypical onset
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How soon it started

Same day
6 18%
1–2 days
3 8.8%
3–7 days
3 8.8%
1–4 weeks
7 21%
Over a month
15 44%

How the animals did

Recovered
10 20%
Recovered with lasting effects
1 2.0%
Still unwell when reported
14 27%
Died
6 12%
Euthanised
11 22%
Not known
9 18%

Problems reported at the same time

Age of the animals

Under 1 year
3
1–3 years
1
4–7 years
6
8–11 years
11
12+ years
30

About this medicine

Type: medicine.

Questions owners ask

Can Hydrocodone cause lethargy in dogs?
51 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 24 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 Hydrocodone in dogs · Medicines most reported with lethargy