Hiding after Methimazole in cats

61 reports to the FDA describe hiding in cats given Methimazole. That is 3.4% of all reports for this medicine, compared with 2.4% across reports for all cat medicines.

61Reports

52%Marked serious

21%Recovered

16%Died or euthanised

13 daysTypical onset

How soon it started

Same day

16 31%

1–2 days

5 9.6%

3–7 days

3 5.8%

1–4 weeks

14 27%

Over a month

14 27%

How the animals did

Recovered

13 21%

Still unwell when reported

18 30%

Died

5 8.2%

Euthanised

5 8.2%

Not known

20 33%

Problems reported at the same time

34 56%

24 39%

23 38%

14 23%

10 16%

10 16%

9 15%

8 13%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Methimazole treats an overactive thyroid in cats.

Questions owners ask

Can Methimazole cause hiding in cats?: 61 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 13 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).

Hiding with similar medicines

Hiding after Velagliflozin (Senvelgo) 91 reports · 1.9% of its reports
Hiding after Bexagliflozin (Bexacat) 92 reports · 2.3% of its reports
Hiding after Insulin 52 reports · 1.4% of its reports

All reported side effects of Methimazole in cats · Medicines most reported with hiding