Cough after Milbemycin Oxime (Interceptor) in dogs

193 reports to the FDA describe cough in dogs given Milbemycin Oxime. That is 0.6% of all reports for this medicine, compared with 0.8% across reports for all dog medicines.

193Reports

24%Marked serious

6.2%Recovered

12%Died or euthanised

88 daysTypical onset

How soon it started

Same day

4 11%

1–2 days

8 22%

3–7 days

1 2.8%

1–4 weeks

4 11%

Over a month

19 53%

How the animals did

Recovered

12 6.2%

Still unwell when reported

18 9.3%

Died

18 9.3%

Euthanised

6 3.1%

Not known

139 72%

Problems reported at the same time

Didn't prevent heartworm

54 28%

46 24%

42 22%

32 17%

26 13%

24 12%

Abnormal radiograph finding

20 10%

Didn't work as expected

18 9.3%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Milbemycin Oxime prevents heartworm and controls some intestinal worms (monthly).

Products with this ingredient include Interceptor. 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 Milbemycin Oxime cause cough in dogs?: 193 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 88 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).

Cough with similar medicines

Cough after Ivermectin + Pyrantel (Heartgard Plus) 727 reports · 0.5% of its reports
Cough after Milbemycin Oxime + Spinosad (Trifexis) 853 reports · 0.7% of its reports
Cough after Moxidectin (ProHeart 6) 434 reports · 0.9% of its reports
Cough after Milbemycin Oxime + Praziquantel (Interceptor Plus) 304 reports · 1.0% of its reports
Cough after Selamectin (Revolution) 224 reports · 0.8% of its reports
Cough after Ivermectin (Heartgard) 117 reports · 1.0% of its reports
Cough after Ivermectin + Praziquantel + Pyrantel (Iverhart Max) 57 reports · 0.7% of its reports
Cough after Moxidectin + Pyrantel + Sarolaner (Simparica Trio) 24 reports · 2.1% of its reports

All reported side effects of Milbemycin Oxime in dogs · Medicines most reported with cough