Behaviour change after Frunevetmab (Solensia) in cats

The FDA has received 303 reports of behaviour change in cats after Frunevetmab. That is 3.8% of all reports for this medicine, compared with 5.4% across reports for all cat medicines.

303Reports

53%Marked serious

19%Recovered

15%Died or euthanised

2 daysTypical onset

How soon it started

Same day

93 32%

1–2 days

52 18%

3–7 days

45 16%

1–4 weeks

36 13%

Over a month

61 21%

How the animals did

Recovered

59 19%

Still unwell when reported

156 51%

Died

13 4.3%

Euthanised

32 11%

Not known

43 14%

Problems reported at the same time

75 25%

62 20%

54 18%

48 16%

45 15%

44 15%

33 11%

25 8.3%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

204

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 behaviour change in cats?: 303 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 2 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 behaviour change