Lymphopenia after Frunevetmab (Solensia) in cats

49 reports to the FDA describe lymphopenia in cats given Frunevetmab. That is 0.6% of all reports for this medicine, compared with 0.4% across reports for all cat medicines, so it is reported unusually often with this medicine.

49Reports

88%Marked serious

10%Recovered

27%Died or euthanised

10 daysTypical onset

How soon it started

Same day

9 21%

1–2 days

3 7.0%

3–7 days

6 14%

1–4 weeks

11 26%

Over a month

14 33%

How the animals did

Recovered

5 10%

Still unwell when reported

28 57%

Died

1 2.0%

Euthanised

12 24%

Not known

3 6.1%

Problems reported at the same time

28 57%

24 49%

16 33%

15 31%

14 29%

13 27%

13 27%

13 27%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

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 lymphopenia in cats?: 49 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 10 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 lymphopenia