Allergic reaction after Lufenuron + Milbemycin Oxime + Praziquantel (Sentinel Spectrum) in dogs

The FDA has received 108 reports of allergic reaction in dogs after Lufenuron + Milbemycin Oxime + Praziquantel. That is 1.1% of all reports for this medicine, compared with 2.3% across reports for all dog medicines, so it is reported less often than average with this medicine.

108Reports
66%Marked serious
44%Recovered
3.7%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
41 53%
1–2 days
18 23%
3–7 days
8 10%
1–4 weeks
1 1.3%
Over a month
9 12%

How the animals did

Recovered
48 44%
Still unwell when reported
36 33%
Died
2 1.9%
Euthanised
2 1.9%
Not known
20 19%

Problems reported at the same time

Age of the animals

Under 1 year
23
1–3 years
32
4–7 years
29
8–11 years
16
12+ years
5

About this medicine

Lufenuron stops flea eggs from developing. Milbemycin Oxime prevents heartworm and controls some intestinal worms (monthly). Praziquantel treats tapeworms.

Products with this combination include Sentinel Spectrum. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Lufenuron + Milbemycin Oxime + Praziquantel cause allergic reaction in dogs?
108 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 the same 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).

Allergic reaction with similar medicines

All reported side effects of Lufenuron + Milbemycin Oxime + Praziquantel in dogs · Medicines most reported with allergic reaction