Spinosad (Comfortis) side effects in Shih Tzus

2,347 FDA reports involve Spinosad in a Shih Tzu. These are the problems they describe.

Vomiting
1,298 55%
Didn't stop fleas
582 25%
Lethargy
271 12%
Itching
186 7.9%
Loss of appetite
124 5.3%
Diarrhea
114 4.9%
Seizures
94 4.0%
Tremors
84 3.6%
Didn't work as expected
71 3.0%
Accidental exposure
51 2.2%
Wobbliness (ataxia)
51 2.2%
Liver problems
48 2.0%

All reports for Spinosad in dogs