Embolism after Melarsomine (Immiticide) in dogs

The FDA has received 44 reports of embolism in dogs after Melarsomine. That is 0.2% of all reports for this medicine, compared with 0.0% across reports for all dog medicines, so it is reported unusually often with this medicine.

44Reports
9.1%Marked serious
0.0%Recovered
30%Died or euthanised
–Typical onset
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How the animals did

Died
12 27%
Euthanised
1 2.3%
Not known
31 70%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
12
4–7 years
18
8–11 years
7
12+ years
1

About this medicine

Melarsomine treats adult heartworm infection (a series of injections given by a vet).

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

Questions owners ask

Can Melarsomine cause embolism in dogs?
44 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.
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).

All reported side effects of Melarsomine in dogs · Medicines most reported with embolism