Diarrhea after Melarsomine (Immiticide) in dogs

1,809 reports to the FDA describe diarrhea in dogs given Melarsomine. That is 8.0% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

1,809Reports

40%Marked serious

12%Recovered

8.1%Died or euthanised

5 daysTypical onset

How soon it started

Same day

276 27%

1–2 days

137 14%

3–7 days

178 18%

1–4 weeks

179 18%

Over a month

239 24%

How the animals did

Recovered

211 12%

Recovered with lasting effects

9 0.5%

Still unwell when reported

452 25%

Died

128 7.1%

Euthanised

19 1.1%

Not known

990 55%

Problems reported at the same time

946 52%

395 22%

346 19%

339 19%

194 11%

154 8.5%

Injection site reaction

141 7.8%

Death

137 7.6%

Age of the animals

Under 1 year

1–3 years

834

4–7 years

659

8–11 years

212

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 diarrhea in dogs?: 1,809 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 5 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).

Diarrhea with similar medicines

Diarrhea after Polysulfated Glycosaminoglycan 1,125 reports · 21% of its reports
Diarrhea after Diphenhydramine 784 reports · 17% of its reports
Diarrhea after Butorphanol 520 reports · 12% of its reports
Diarrhea after Cefpodoxime 373 reports · 9.2% of its reports
Diarrhea after Tramadol 578 reports · 15% of its reports
Diarrhea after Florfenicol + Mometasone + Terbinafine 186 reports · 5.3% of its reports
Diarrhea after Desoxycorticosterone Pivalate 369 reports · 11% of its reports
Diarrhea after Propofol 228 reports · 7.4% of its reports
Diarrhea after Dirlotapide 387 reports · 14% of its reports
Diarrhea after Isoflurane 262 reports · 9.5% of its reports

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