Death after Lotilaner + Moxidectin + Praziquantel + Pyrantel (Credelio Quattro) in dogs

69 reports to the FDA describe death in dogs given Lotilaner + Moxidectin + Praziquantel + Pyrantel. That is 2.2% of all reports for this medicine, compared with 5.2% across reports for all dog medicines, so it is reported less often than average with this medicine.

69Reports
100%Marked serious
0.0%Recovered
100%Died or euthanised
28 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
7 13%
1–2 days
9 16%
3–7 days
2 3.6%
1–4 weeks
12 21%
Over a month
26 46%

How the animals did

Died
41 59%
Euthanised
28 41%

Problems reported at the same time

22 32%
19 28%
16 23%
15 22%
Necropsy performed
10 14%

Age of the animals

Under 1 year
7
1–3 years
9
4–7 years
14
8–11 years
18
12+ years
11

About this medicine

Lotilaner kills fleas and ticks; monthly chewable. Moxidectin prevents heartworm disease (monthly topical, or a 6- or 12-month injection for dogs). Praziquantel treats tapeworms. Pyrantel treats roundworms and hookworms.

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

In 2018 the FDA alerted owners and vets that isoxazoline products have been associated with neurologic reactions such as muscle tremors, wobbliness (ataxia) and seizures, including in animals with no history of them.

Questions owners ask

Can Lotilaner + Moxidectin + Praziquantel + Pyrantel cause death in dogs?
69 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 28 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).

Death with similar medicines

All reported side effects of Lotilaner + Moxidectin + Praziquantel + Pyrantel in dogs · Medicines most reported with death