Chlorphenamine side effects in dogs

76 reports sent to the FDA between 2011 and 2019 involve Chlorphenamine in dogs. The most reported problems were vomiting, lethargy, itching. 17% were marked serious.

76Reports
17%Marked serious
0.0%Only medicine involved
68%Recovered
2.6%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

50 66%
Lethargy
12 16%
Itching
5 6.6%
Behaviour change
5 6.6%
Liver problems
4 5.3%
Diarrhea
4 5.3%
Seizures
3 3.9%
Breathing problems
3 3.9%
Tremors
3 3.9%
Skin rash or irritation
3 3.9%
Loss of appetite
3 3.9%
Cataract
3 3.9%
Ear infection
2 2.6%
Weight gain
2 2.6%
Drooling
2 2.6%

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 work as expected
10 13%
Didn't prevent heartworm
3 3.9%
Didn't stop fleas
3 3.9%

How soon problems started

Same day
4 9.5%
1–2 days
1 2.4%
3–7 days
1 2.4%
1–4 weeks
2 4.8%
Over a month
34 81%

Time from the first dose to the first sign, where both dates were reported (42 reports).

How the animals did

Recovered
45 59%
Recovered with lasting effects
7 9.2%
Still unwell when reported
8 11%
Died
2 2.6%
Not known
14 18%

Breeds named most often

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

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