Drooling after Methimazole in cats

The FDA has received 32 reports of drooling in cats after Methimazole. That is 1.8% of all reports for this medicine, compared with 5.6% across reports for all cat medicines, so it is reported less often than average with this medicine.

32Reports

59%Marked serious

22%Recovered

19%Died or euthanised

17 daysTypical onset

How soon it started

Same day

8 30%

1–2 days

1 3.7%

3–7 days

1 3.7%

1–4 weeks

10 37%

Over a month

7 26%

How the animals did

Recovered

7 22%

Still unwell when reported

10 31%

Died

3 9.4%

Euthanised

3 9.4%

Not known

9 28%

Problems reported at the same time

11 34%

10 31%

10 31%

7 22%

6 19%

6 19%

5 16%

5 16%

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 drooling in cats?: 32 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 17 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).

Drooling with similar medicines

Drooling after Velagliflozin (Senvelgo) 133 reports · 2.8% of its reports
Drooling after Bexagliflozin (Bexacat) 20 reports · 0.5% of its reports
Drooling after Insulin 43 reports · 1.1% of its reports

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