Systemic disorder after Melarsomine (Immiticide) in dogs

The FDA has received 48 reports of systemic disorder in dogs after Melarsomine. That is 0.2% of all reports for this medicine, compared with 0.2% across reports for all dog medicines.

48Reports
67%Marked serious
13%Recovered
8.3%Died or euthanised
31 daysTypical onset
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How soon it started

Same day
7 23%
1–2 days
1 3.3%
3–7 days
1 3.3%
1–4 weeks
4 13%
Over a month
17 57%

How the animals did

Recovered
5 10%
Recovered with lasting effects
1 2.1%
Still unwell when reported
5 10%
Died
1 2.1%
Euthanised
3 6.3%
Not known
33 69%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
14
4–7 years
20
8–11 years
6
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 systemic disorder in dogs?
48 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 31 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).

Systemic disorder with similar medicines

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