Lethargy after Lactulose in cats

43 reports to the FDA describe lethargy in cats given Lactulose. That is 21% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

43Reports
42%Marked serious
28%Recovered
19%Died or euthanised
9 daysTypical onset
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How soon it started

Same day
6 16%
1–2 days
6 16%
3–7 days
6 16%
1–4 weeks
7 19%
Over a month
12 32%

How the animals did

Recovered
12 28%
Still unwell when reported
11 26%
Died
6 14%
Euthanised
2 4.7%
Not known
12 28%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
3
4–7 years
9
8–11 years
7
12+ years
23

About this medicine

Type: medicine.

Questions owners ask

Can Lactulose cause lethargy in cats?
43 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 9 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 Lactulose in cats · Medicines most reported with lethargy