Skin lump after Melarsomine (Immiticide) in dogs

79 reports to the FDA describe skin lump in dogs given Melarsomine. That is 0.3% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

79Reports

27%Marked serious

1.3%Recovered

0.0%Died or euthanised

38 daysTypical onset

How soon it started

Same day

5 10%

1–2 days

3 6.3%

3–7 days

0 0.0%

1–4 weeks

11 23%

Over a month

29 60%

How the animals did

Recovered with lasting effects

1 1.3%

Still unwell when reported

19 24%

Not known

59 75%

Problems reported at the same time

Injection site reaction

23 29%

15 19%

7 8.9%

6 7.6%

5 6.3%

5 6.3%

4 5.1%

3 3.8%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

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 skin lump in dogs?: 79 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 38 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).

Skin lump with similar medicines

Skin lump after Polysulfated Glycosaminoglycan 25 reports · 0.5% of its reports
Skin lump after Diphenhydramine 26 reports · 0.6% of its reports
Skin lump after Cefpodoxime 35 reports · 0.9% of its reports

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