Hypokalaemia after Melarsomine (Immiticide) in dogs

42 reports to the FDA describe hypokalaemia in dogs given Melarsomine. That is 0.2% of all reports for this medicine, compared with 0.1% across reports for all dog medicines.

42Reports
88%Marked serious
14%Recovered
17%Died or euthanised
11 daysTypical onset
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How soon it started

Same day
8 20%
1–2 days
4 9.8%
3–7 days
4 9.8%
1–4 weeks
12 29%
Over a month
13 32%

How the animals did

Recovered
6 14%
Still unwell when reported
18 43%
Died
4 9.5%
Euthanised
3 7.1%
Not known
11 26%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
20
4–7 years
16
8–11 years
5
12+ years
1

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 hypokalaemia in dogs?
42 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 11 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).

Hypokalaemia with similar medicines

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