Diarrhea after S-methoprene in dogs

The FDA has received 143 reports of diarrhea in dogs after S-methoprene. That is 8.7% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

143Reports
0.0%Marked serious
0.7%Recovered
9.8%Died or euthanised
–Typical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How the animals did

Recovered
1 0.7%
Still unwell when reported
1 0.7%
Died
14 9.8%
Not known
127 89%

Problems reported at the same time

Age of the animals

Under 1 year
42
1–3 years
37
4–7 years
32
8–11 years
15
12+ years
8

About this medicine

Type: medicine.

Questions owners ask

Can S-methoprene cause diarrhea in dogs?
143 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).

Diarrhea with similar medicines

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