Lethargy after Methylprednisolone in cats

368 reports to the FDA describe lethargy in cats given Methylprednisolone. That is 23% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

368Reports
45%Marked serious
12%Recovered
28%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
82 30%
1–2 days
60 22%
3–7 days
44 16%
1–4 weeks
58 21%
Over a month
30 11%

How the animals did

Recovered
45 12%
Still unwell when reported
115 31%
Died
54 15%
Euthanised
48 13%
Not known
106 29%

Problems reported at the same time

Age of the animals

Under 1 year
13
1–3 years
72
4–7 years
102
8–11 years
99
12+ years
74

About this medicine

Type: medicine.

Questions owners ask

Can Methylprednisolone cause lethargy in cats?
368 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 Methylprednisolone in cats · Medicines most reported with lethargy