Weakness after Frunevetmab (Solensia) in cats

The FDA has received 272 reports of weakness in cats after Frunevetmab. That is 3.4% of all reports for this medicine, compared with 1.2% across reports for all cat medicines, so it is reported unusually often with this medicine.

272Reports

76%Marked serious

5.1%Recovered

28%Died or euthanised

4 daysTypical onset

How soon it started

Same day

76 31%

1–2 days

33 13%

3–7 days

34 14%

1–4 weeks

41 17%

Over a month

63 26%

How the animals did

Recovered

13 4.8%

Recovered with lasting effects

1 0.4%

Still unwell when reported

165 61%

Died

20 7.4%

Euthanised

56 21%

Not known

17 6.3%

Problems reported at the same time

78 29%

76 28%

70 26%

58 21%

50 18%

43 16%

42 15%

30 11%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

222

About this medicine

Frunevetmab reduces osteoarthritis pain in cats (monthly injection).

Products with this ingredient include Solensia. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Frunevetmab cause weakness in cats?: 272 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 4 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).

All reported side effects of Frunevetmab in cats · Medicines most reported with weakness