Pyriproxyfen side effects in dogs

297 reports sent to the FDA between 2009 and 2026 involve Pyriproxyfen in dogs. The most reported problems were vomiting, lethargy, loss of appetite. 19% were marked serious.

297Reports
19%Marked serious
0.3%Only medicine involved
51%Recovered
3.7%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

125 42%
46 15%
Diarrhea
19 6.4%
Behaviour change
14 4.7%
Itching
13 4.4%
Tremors
12 4.0%
Liver problems
11 3.7%
Restlessness or agitation
11 3.7%
Seizures
11 3.7%
Drooling
9 3.0%
Blood problems
9 3.0%
Breathing problems
8 2.7%
Weight loss
8 2.7%
Kidney problems
6 2.0%

Share = percentage of this medicine's reports that mention the problem. One report can list several problems.

Reports that it didn't work

Some reports are about the medicine not working (for example a dog still getting fleas or heartworm), not about a side effect.

Didn't prevent heartworm
14 4.7%
Didn't stop ticks
4 1.3%

How soon problems started

Same day
41 20%
1–2 days
20 9.8%
3–7 days
5 2.5%
1–4 weeks
35 17%
Over a month
103 50%

Time from the first dose to the first sign, where both dates were reported (204 reports).

How the animals did

Recovered
141 47%
Recovered with lasting effects
9 3.0%
Still unwell when reported
35 12%
Died
4 1.3%
Euthanised
7 2.4%
Not known
101 34%

Breeds named most often

Popular breeds appear more often because there are more of them.

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