Behaviour change after Hydromorphone in cats

38 reports to the FDA describe behaviour change in cats given Hydromorphone. That is 14% 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.

38Reports
37%Marked serious
26%Recovered
5.3%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
25 69%
1–2 days
6 17%
3–7 days
0 0.0%
1–4 weeks
2 5.6%
Over a month
3 8.3%

How the animals did

Recovered
10 26%
Still unwell when reported
12 32%
Died
2 5.3%
Not known
14 37%

Problems reported at the same time

7 18%
Not sleeping
5 13%
Wobbliness (ataxia)
4 11%
Eye or vision problems
4 11%

Age of the animals

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

About this medicine

Type: medicine.

Questions owners ask

Can Hydromorphone cause behaviour change in cats?
38 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 Hydromorphone in cats · Medicines most reported with behaviour change