Behaviour change after Acepromazine in cats

The FDA has received 61 reports of behaviour change in cats after Acepromazine. That is 10% of all reports for this medicine, compared with 5.4% across reports for all cat medicines, so it is reported unusually often with this medicine.

61Reports
34%Marked serious
44%Recovered
11%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
32 57%
1–2 days
17 30%
3–7 days
3 5.4%
1–4 weeks
3 5.4%
Over a month
1 1.8%

How the animals did

Recovered
26 43%
Recovered with lasting effects
1 1.6%
Still unwell when reported
17 28%
Died
3 4.9%
Euthanised
4 6.6%
Not known
10 16%

Problems reported at the same time

Age of the animals

Under 1 year
25
1–3 years
14
4–7 years
6
8–11 years
9
12+ years
5

About this medicine

Type: medicine.

Questions owners ask

Can Acepromazine cause behaviour change in cats?
61 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 the same day 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 Acepromazine in cats · Medicines most reported with behaviour change