Swelling after Polymyxin B in cats

44 reports to the FDA describe swelling in cats given Polymyxin B. That is 22% of all reports for this medicine, compared with 1.9% across reports for all cat medicines, so it is reported unusually often with this medicine.

44Reports
18%Marked serious
18%Recovered
6.8%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
10 67%
1–2 days
0 0.0%
3–7 days
3 20%
1–4 weeks
1 6.7%
Over a month
1 6.7%

How the animals did

Recovered
8 18%
Still unwell when reported
9 20%
Died
3 6.8%
Not known
24 55%

Problems reported at the same time

16 36%
Diarrhea
8 18%
Itching
8 18%
Drooling
4 9.1%
Breathing problems
4 9.1%

Age of the animals

Under 1 year
13
1–3 years
13
4–7 years
3
8–11 years
4
12+ years
7

About this medicine

Type: medicine.

Questions owners ask

Can Polymyxin B cause swelling in cats?
44 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).

Swelling with similar medicines

All reported side effects of Polymyxin B in cats · Medicines most reported with swelling