Didn't work as expected after Lactulose in cats

The FDA has received 25 reports of didn't work as expected in cats after Lactulose. That is 12% of all reports for this medicine, compared with 8.7% across reports for all cat medicines.

25Reports
44%Marked serious
8.0%Recovered
16%Died or euthanised
18 daysTypical onset
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How soon it started

Same day
2 13%
1–2 days
1 6.3%
3–7 days
0 0.0%
1–4 weeks
6 38%
Over a month
7 44%

How the animals did

Recovered
2 8.0%
Still unwell when reported
13 52%
Died
1 4.0%
Euthanised
3 12%
Not known
6 24%

Problems reported at the same time

4 16%
Vocalising
3 12%
Febrile
3 12%

Age of the animals

Under 1 year
0
1–3 years
0
4–7 years
1
8–11 years
5
12+ years
18

About this medicine

Type: medicine.

Questions owners ask

Can Lactulose cause didn't work as expected in cats?
25 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 18 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).

Didn't work as expected with similar medicines

All reported side effects of Lactulose in cats · Medicines most reported with didn't work as expected