Reluctant to move after Levothyroxine in dogs

The FDA has received 22 reports of reluctant to move in dogs after Levothyroxine. That is 0.7% of all reports for this medicine, compared with 0.5% across reports for all dog medicines, so it is reported unusually often with this medicine.

22Reports

59%Marked serious

27%Recovered

27%Died or euthanised

75 daysTypical onset

How soon it started

Same day

1 5.9%

1–2 days

0 0.0%

3–7 days

0 0.0%

1–4 weeks

4 24%

Over a month

12 71%

How the animals did

Recovered

6 27%

Still unwell when reported

6 27%

Euthanised

6 27%

Not known

4 18%

Problems reported at the same time

12 55%

8 36%

8 36%

6 27%

6 27%

5 23%

Abnormal radiograph finding

5 23%

Abdominal pain

4 18%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Levothyroxine treats an underactive thyroid.

Questions owners ask

Can Levothyroxine cause reluctant to move in dogs?: 22 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 75 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).

Reluctant to move with similar medicines

Reluctant to move after Trilostane (Vetoryl) 113 reports · 0.9% of its reports
Reluctant to move after Insulin 33 reports · 0.4% of its reports
Reluctant to move after Phenylpropanolamine (Proin) 28 reports · 0.7% of its reports

All reported side effects of Levothyroxine in dogs · Medicines most reported with reluctant to move