Didn't prevent heartworm after Trazodone in dogs

The FDA has received 153 reports of didn't prevent heartworm in dogs after Trazodone. That is 6.0% of all reports for this medicine, compared with 13% across reports for all dog medicines, so it is reported less often than average with this medicine.

153Reports

31%Marked serious

2.0%Recovered

1.3%Died or euthanised

201 daysTypical onset

How soon it started

Same day

3 4.6%

1–2 days

1 1.5%

3–7 days

0 0.0%

1–4 weeks

4 6.2%

Over a month

57 88%

How the animals did

Recovered

3 2.0%

Still unwell when reported

43 28%

Died

1 0.7%

Euthanised

1 0.7%

Not known

105 69%

Problems reported at the same time

14 9.2%

10 6.5%

10 6.5%

9 5.9%

9 5.9%

7 4.6%

7 4.6%

7 4.6%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Trazodone reduces anxiety and stress.

Questions owners ask

Can Trazodone cause didn't prevent heartworm in dogs?: 153 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 201 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).

Didn't prevent heartworm with similar medicines

Didn't prevent heartworm after Gabapentin 161 reports · 1.8% of its reports
Didn't prevent heartworm after Fluoxetine 45 reports · 1.7% of its reports

All reported side effects of Trazodone in dogs · Medicines most reported with didn't prevent heartworm