Not himself/herself after Moxidectin (ProHeart 6) in dogs

The FDA has received 165 reports of not himself/herself in dogs after Moxidectin. That is 0.3% of all reports for this medicine, compared with 0.3% across reports for all dog medicines.

165Reports
85%Marked serious
18%Recovered
13%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
76 49%
1–2 days
29 19%
3–7 days
13 8.4%
1–4 weeks
13 8.4%
Over a month
24 15%

How the animals did

Recovered
30 18%
Still unwell when reported
100 61%
Died
11 6.7%
Euthanised
10 6.1%
Not known
14 8.5%

Problems reported at the same time

Age of the animals

Under 1 year
2
1–3 years
54
4–7 years
55
8–11 years
37
12+ years
16

About this medicine

Moxidectin prevents heartworm disease (monthly topical, or a 6- or 12-month injection for dogs).

Products with this ingredient include ProHeart 6, ProHeart 12. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Some herding breeds (for example Collies) carry the MDR1 gene variant and can be more sensitive to this drug class at high doses.

Questions owners ask

Can Moxidectin cause not himself/herself in dogs?
165 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 1 day 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).

Not himself/herself with similar medicines

All reported side effects of Moxidectin in dogs · Medicines most reported with not himself/herself