Weakness after Melarsomine (Immiticide) in dogs

The FDA has received 401 reports of weakness in dogs after Melarsomine. That is 1.8% of all reports for this medicine, compared with 1.4% across reports for all dog medicines.

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How soon it started

How the animals did

Problems reported at the same time

Age of the animals

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 weakness in dogs?

401 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 4 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).

Weakness with similar medicines

• Weakness after Polysulfated Glycosaminoglycan 263 reports · 4.8% of its reports
• Weakness after Diphenhydramine 204 reports · 4.3% of its reports
• Weakness after Butorphanol 117 reports · 2.6% of its reports
• Weakness after Cefpodoxime 101 reports · 2.5% of its reports
• Weakness after Tramadol 211 reports · 5.6% of its reports
• Weakness after Florfenicol + Mometasone + Terbinafine 55 reports · 1.6% of its reports
• Weakness after Desoxycorticosterone Pivalate 158 reports · 4.7% of its reports
• Weakness after Propofol 61 reports · 2.0% of its reports
• Weakness after Isoflurane 70 reports · 2.5% of its reports
• Weakness after Cephalexin 83 reports · 3.1% of its reports

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