Didn't prevent heartworm after Fluoxetine in dogs

45 reports to the FDA describe didn't prevent heartworm in dogs given Fluoxetine. That is 1.7% 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.

45Reports

16%Marked serious

4.4%Recovered

2.2%Died or euthanised

239 daysTypical onset

How soon it started

Same day

0 0.0%

1–2 days

0 0.0%

3–7 days

1 6.3%

1–4 weeks

1 6.3%

Over a month

14 88%

How the animals did

Recovered

1 2.2%

Recovered with lasting effects

1 2.2%

Still unwell when reported

13 29%

Euthanised

1 2.2%

Not known

29 64%

Problems reported at the same time

Didn't work as expected

5 11%

4 8.9%

3 6.7%

3 6.7%

2 4.4%

2 4.4%

External ear disorder

1 2.2%

Weight loss

1 2.2%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Fluoxetine treats anxiety and behaviour problems.

Questions owners ask

Can Fluoxetine cause didn't prevent heartworm in dogs?: 45 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 239 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 Trazodone 153 reports · 6.0% of its reports

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