Pale mucous membrane after Melarsomine (Immiticide) in dogs

454 reports to the FDA describe pale mucous membrane in dogs given Melarsomine. That is 2.0% of all reports for this medicine, compared with 0.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

454Reports
58%Marked serious
17%Recovered
16%Died or euthanised
7 daysTypical onset
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How soon it started

Same day
97 34%
1–2 days
17 6.0%
3–7 days
34 12%
1–4 weeks
52 18%
Over a month
83 29%

How the animals did

Recovered
77 17%
Still unwell when reported
116 26%
Died
56 12%
Euthanised
17 3.7%
Not known
188 41%

Problems reported at the same time

Age of the animals

Under 1 year
3
1–3 years
235
4–7 years
153
8–11 years
41
12+ years
8

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 pale mucous membrane in dogs?
454 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 7 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).

Pale mucous membrane with similar medicines

All reported side effects of Melarsomine in dogs · Medicines most reported with pale mucous membrane