Sleepiness - systemic disorder after Trilostane (Vetoryl) in dogs

The FDA has received 83 reports of sleepiness - systemic disorder in dogs after Trilostane. That is 0.7% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

83Reports

55%Marked serious

9.6%Recovered

17%Died or euthanised

44 daysTypical onset

How soon it started

Same day

5 8.2%

1–2 days

2 3.3%

3–7 days

4 6.6%

1–4 weeks

12 20%

Over a month

38 62%

How the animals did

Recovered

8 9.6%

Still unwell when reported

10 12%

Died

4 4.8%

Euthanised

10 12%

Not known

51 61%

Problems reported at the same time

37 45%

27 33%

25 30%

21 25%

17 20%

14 17%

14 17%

14 17%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Trilostane treats Cushing's disease (an overactive adrenal gland).

Products with this ingredient include Vetoryl. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Trilostane cause sleepiness - systemic disorder in dogs?: 83 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 44 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).

Sleepiness - systemic disorder with similar medicines

Sleepiness - systemic disorder after Insulin 26 reports · 0.4% of its reports

All reported side effects of Trilostane in dogs · Medicines most reported with sleepiness - systemic disorder