Elevated amylase after Moxidectin (ProHeart 6) in dogs

The FDA has received 149 reports of elevated amylase in dogs after Moxidectin. That is 0.3% of all reports for this medicine, compared with 0.3% across reports for all dog medicines.

149Reports

34%Marked serious

5.4%Recovered

38%Died or euthanised

2 daysTypical onset

How soon it started

Same day

18 29%

1–2 days

17 27%

3–7 days

9 14%

1–4 weeks

9 14%

Over a month

10 16%

How the animals did

Recovered

8 5.4%

Still unwell when reported

39 26%

Died

42 28%

Euthanised

14 9.4%

Not known

46 31%

Problems reported at the same time

80 54%

79 53%

77 52%

68 46%

56 38%

56 38%

49 33%

48 32%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

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 elevated amylase in dogs?: 149 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 2 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).

Elevated amylase with similar medicines

Elevated amylase after Ivermectin + Pyrantel (Heartgard Plus) 94 reports · 0.1% of its reports
Elevated amylase after Milbemycin Oxime + Spinosad (Trifexis) 129 reports · 0.1% of its reports
Elevated amylase after Milbemycin Oxime + Praziquantel (Interceptor Plus) 30 reports · 0.1% of its reports
Elevated amylase after Milbemycin Oxime (Interceptor) 33 reports · 0.1% of its reports
Elevated amylase after Selamectin (Revolution) 39 reports · 0.1% of its reports
Elevated amylase after Ivermectin (Heartgard) 26 reports · 0.2% of its reports

All reported side effects of Moxidectin in dogs · Medicines most reported with elevated amylase