Itching after Melarsomine (Immiticide) in dogs

305 reports to the FDA describe itching in dogs given Melarsomine. That is 1.3% of all reports for this medicine, compared with 4.3% across reports for all dog medicines, so it is reported less often than average with this medicine.

305Reports
40%Marked serious
16%Recovered
2.6%Died or euthanised
14 daysTypical onset
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How soon it started

Same day
60 29%
1–2 days
14 6.9%
3–7 days
23 11%
1–4 weeks
39 19%
Over a month
68 33%

How the animals did

Recovered
45 15%
Recovered with lasting effects
3 1.0%
Still unwell when reported
78 26%
Died
7 2.3%
Euthanised
1 0.3%
Not known
171 56%

Problems reported at the same time

Age of the animals

Under 1 year
4
1–3 years
137
4–7 years
107
8–11 years
40
12+ years
4

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 itching in dogs?
305 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 14 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).

Itching with similar medicines

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