Lethargy after Melarsomine (Immiticide) in dogs

The FDA has received 2,412 reports of lethargy in dogs after Melarsomine. That is 11% of all reports for this medicine, compared with 11% 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 lethargy in dogs?

2,412 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).

Lethargy with similar medicines

• Lethargy after Polysulfated Glycosaminoglycan 1,037 reports · 19% of its reports
• Lethargy after Diphenhydramine 1,169 reports · 25% of its reports
• Lethargy after Butorphanol 661 reports · 15% of its reports
• Lethargy after Cefpodoxime 737 reports · 18% of its reports
• Lethargy after Tramadol 833 reports · 22% of its reports
• Lethargy after Florfenicol + Mometasone + Terbinafine 425 reports · 12% of its reports
• Lethargy after Desoxycorticosterone Pivalate 630 reports · 19% of its reports
• Lethargy after Propofol 315 reports · 10% of its reports
• Lethargy after Dirlotapide 460 reports · 16% of its reports
• Lethargy after Isoflurane 377 reports · 14% of its reports

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