Blood in stool after Melarsomine (Immiticide) in dogs

The FDA has received 117 reports of blood in stool in dogs after Melarsomine. That is 0.5% of all reports for this medicine, compared with 0.6% across reports for all dog medicines.

117Reports

23%Marked serious

2.6%Recovered

19%Died or euthanised

28 daysTypical onset

How soon it started

Same day

5 19%

1–2 days

3 12%

3–7 days

4 15%

1–4 weeks

4 15%

Over a month

10 38%

How the animals did

Recovered

3 2.6%

Still unwell when reported

12 10%

Died

19 16%

Euthanised

3 2.6%

Not known

80 68%

Problems reported at the same time

50 43%

34 29%

33 28%

26 22%

23 20%

22 19%

22 19%

20 17%

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 blood in stool in dogs?: 117 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 28 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).

Blood in stool with similar medicines

Blood in stool after Polysulfated Glycosaminoglycan 74 reports · 1.4% of its reports
Blood in stool after Diphenhydramine 55 reports · 1.2% of its reports
Blood in stool after Butorphanol 62 reports · 1.4% of its reports
Blood in stool after Cefpodoxime 40 reports · 1.0% of its reports
Blood in stool after Tramadol 61 reports · 1.6% of its reports
Blood in stool after Desoxycorticosterone Pivalate 26 reports · 0.8% of its reports
Blood in stool after Propofol 35 reports · 1.1% of its reports
Blood in stool after Isoflurane 39 reports · 1.4% of its reports
Blood in stool after Atipamezole 26 reports · 1.0% of its reports
Blood in stool after Famotidine 75 reports · 2.8% of its reports

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