Anxiety after Melarsomine (Immiticide) in dogs

134 reports to the FDA describe anxiety in dogs given Melarsomine. That is 0.6% of all reports for this medicine, compared with 0.5% across reports for all dog medicines.

134Reports
67%Marked serious
22%Recovered
3.7%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
65 55%
1–2 days
11 9.2%
3–7 days
4 3.4%
1–4 weeks
6 5.0%
Over a month
33 28%

How the animals did

Recovered
30 22%
Still unwell when reported
42 31%
Died
1 0.7%
Euthanised
4 3.0%
Not known
57 43%

Problems reported at the same time

Age of the animals

Under 1 year
1
1–3 years
60
4–7 years
52
8–11 years
14
12+ years
2

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 anxiety in dogs?
134 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 the same day 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).

Anxiety with similar medicines

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