Adipsia after Afoxolaner (NexGard) in dogs

201 reports to the FDA describe adipsia in dogs given Afoxolaner. That is 0.4% of all reports for this medicine, compared with 0.4% across reports for all dog medicines.

201Reports
70%Marked serious
24%Recovered
10%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
76 44%
1–2 days
41 24%
3–7 days
8 4.7%
1–4 weeks
14 8.2%
Over a month
32 19%

How the animals did

Recovered
49 24%
Still unwell when reported
15 7.5%
Died
10 5.0%
Euthanised
11 5.5%
Not known
116 58%

Problems reported at the same time

Age of the animals

Under 1 year
28
1–3 years
63
4–7 years
40
8–11 years
42
12+ years
16

About this medicine

Afoxolaner kills fleas and ticks; given as a monthly chewable.

Products with this ingredient include NexGard. 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 Afoxolaner cause adipsia in dogs?
201 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 1 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).

Adipsia with similar medicines

All reported side effects of Afoxolaner in dogs · Medicines most reported with adipsia