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

177 reports to the FDA describe itching in dogs given Lotilaner + Moxidectin + Praziquantel + Pyrantel. That is 5.7% of all reports for this medicine, compared with 4.3% across reports for all dog medicines.

177Reports
7.3%Marked serious
25%Recovered
2.3%Died or euthanised
8 daysTypical onset
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How soon it started

Same day
29 18%
1–2 days
35 22%
3–7 days
14 8.9%
1–4 weeks
18 11%
Over a month
61 39%

How the animals did

Recovered
45 25%
Still unwell when reported
88 50%
Died
1 0.6%
Euthanised
3 1.7%
Not known
40 23%

Problems reported at the same time

Age of the animals

Under 1 year
25
1–3 years
51
4–7 years
47
8–11 years
28
12+ years
12

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 itching in dogs?
177 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 8 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).

Itching with similar medicines

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