Wobbliness after Milbemycin Oxime + Praziquantel (Interceptor Plus) in dogs

45 reports to the FDA describe wobbliness in dogs given Milbemycin Oxime + Praziquantel. That is 0.1% of all reports for this medicine, compared with 0.1% across reports for all dog medicines.

45Reports
42%Marked serious
36%Recovered
6.7%Died or euthanised
4 daysTypical onset
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How soon it started

Same day
13 39%
1–2 days
3 9.1%
3–7 days
3 9.1%
1–4 weeks
3 9.1%
Over a month
11 33%

How the animals did

Recovered
16 36%
Still unwell when reported
14 31%
Died
2 4.4%
Euthanised
1 2.2%
Not known
12 27%

Problems reported at the same time

Age of the animals

Under 1 year
9
1–3 years
12
4–7 years
5
8–11 years
13
12+ years
6

About this medicine

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

Products with this combination include Interceptor Plus. 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 + Praziquantel cause wobbliness in dogs?
45 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).

Wobbliness with similar medicines

All reported side effects of Milbemycin Oxime + Praziquantel in dogs · Medicines most reported with wobbliness