Drooling after Sarolaner + Selamectin (Revolution Plus) in cats

171 reports to the FDA describe drooling in cats given Sarolaner + Selamectin. That is 2.1% of all reports for this medicine, compared with 5.6% across reports for all cat medicines, so it is reported less often than average with this medicine.

171Reports
46%Marked serious
28%Recovered
8.2%Died or euthanised
Same dayTypical onset
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How soon it started

Same day
111 67%
1–2 days
30 18%
3–7 days
5 3.0%
1–4 weeks
11 6.6%
Over a month
9 5.4%

How the animals did

Recovered
48 28%
Still unwell when reported
70 41%
Died
9 5.3%
Euthanised
5 2.9%
Not known
39 23%

Problems reported at the same time

Age of the animals

Under 1 year
20
1–3 years
56
4–7 years
38
8–11 years
26
12+ years
17

About this medicine

Sarolaner kills fleas, ticks and some mites; monthly. Selamectin prevents heartworm and treats fleas, ear mites and some worms (spot-on).

Products with this combination include Revolution Plus. 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 Sarolaner + Selamectin cause drooling in cats?
171 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).

Drooling with similar medicines

All reported side effects of Sarolaner + Selamectin in cats · Medicines most reported with drooling