Lethargy after Acepromazine in dogs

The FDA has received 278 reports of lethargy in dogs after Acepromazine. That is 16% of all reports for this medicine, compared with 11% across reports for all dog medicines.

278Reports
60%Marked serious
26%Recovered
20%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
65 30%
1–2 days
60 28%
3–7 days
41 19%
1–4 weeks
34 16%
Over a month
18 8.3%

How the animals did

Recovered
69 25%
Recovered with lasting effects
4 1.4%
Still unwell when reported
91 33%
Died
25 9.0%
Euthanised
31 11%
Not known
58 21%

Problems reported at the same time

Age of the animals

Under 1 year
36
1–3 years
76
4–7 years
88
8–11 years
57
12+ years
13

About this medicine

Type: medicine.

Questions owners ask

Can Acepromazine cause lethargy in dogs?
278 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 2 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 Acepromazine in dogs · Medicines most reported with lethargy