Reddening of the skin after Melarsomine (Immiticide) in dogs

The FDA has received 49 reports of reddening of the skin in dogs after Melarsomine. That is 0.2% of all reports for this medicine, compared with 0.4% across reports for all dog medicines, so it is reported less often than average with this medicine.

49Reports

59%Marked serious

24%Recovered

4.1%Died or euthanised

9 daysTypical onset

How soon it started

Same day

16 33%

1–2 days

3 6.3%

3–7 days

5 10%

1–4 weeks

8 17%

Over a month

16 33%

How the animals did

Recovered

12 24%

Still unwell when reported

28 57%

Euthanised

2 4.1%

Not known

7 14%

Problems reported at the same time

24 49%

18 37%

13 27%

9 18%

Skin rash or irritation

8 16%

Diarrhea

8 16%

Hair loss

7 14%

Lethargy

6 12%

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 reddening of the skin in dogs?: 49 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 9 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).

Reddening of the skin with similar medicines

Reddening of the skin after Diphenhydramine 106 reports · 2.2% of its reports
Reddening of the skin after Butorphanol 40 reports · 0.9% of its reports
Reddening of the skin after Cefpodoxime 52 reports · 1.3% of its reports
Reddening of the skin after Propofol 21 reports · 0.7% of its reports
Reddening of the skin after Isoflurane 22 reports · 0.8% of its reports
Reddening of the skin after Cephalexin 25 reports · 0.9% of its reports
Reddening of the skin after Atipamezole 23 reports · 0.9% of its reports
Reddening of the skin after Famotidine 27 reports · 1.0% of its reports
Reddening of the skin after Ketoconazole 26 reports · 1.2% of its reports
Reddening of the skin after Tigilanol Tiglate 34 reports · 1.7% of its reports

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