Loss of appetite after S-methoprene in dogs

The FDA has received 191 reports of loss of appetite in dogs after S-methoprene. That is 12% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

191Reports
0.0%Marked serious
1.0%Recovered
5.2%Died or euthanised
–Typical onset
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How the animals did

Recovered
2 1.0%
Died
10 5.2%
Not known
179 94%

Problems reported at the same time

113 59%
74 39%
35 18%
Adipsia
15 7.9%
13 6.8%
9 4.7%

Age of the animals

Under 1 year
44
1–3 years
53
4–7 years
41
8–11 years
27
12+ years
11

About this medicine

Type: medicine.

Questions owners ask

Can S-methoprene cause loss of appetite in dogs?
191 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.
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).

Loss of appetite with similar medicines

All reported side effects of S-methoprene in dogs · Medicines most reported with loss of appetite