Loss of appetite after Lactulose in cats

The FDA has received 52 reports of loss of appetite in cats after Lactulose. That is 26% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

52Reports
50%Marked serious
9.6%Recovered
21%Died or euthanised
11 daysTypical onset
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How soon it started

Same day
8 19%
1–2 days
5 12%
3–7 days
4 9.3%
1–4 weeks
16 37%
Over a month
10 23%

How the animals did

Recovered
5 9.6%
Still unwell when reported
19 37%
Died
4 7.7%
Euthanised
7 13%
Not known
17 33%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
2
4–7 years
9
8–11 years
7
12+ years
34

About this medicine

Type: medicine.

Questions owners ask

Can Lactulose cause loss of appetite in cats?
52 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 11 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).

Loss of appetite with similar medicines

All reported side effects of Lactulose in cats · Medicines most reported with loss of appetite