Loratadine side effects in dogs

95 reports sent to the FDA between 2012 and 2026 involve Loratadine in dogs. The most reported problems were vomiting, lethargy, diarrhea. 43% were marked serious.

95Reports
43%Marked serious
0.0%Only medicine involved
41%Recovered
11%Died or euthanised
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About this medicine

Type: medicine.

Most reported side effects

22 23%
Lethargy
19 20%
Diarrhea
16 17%
Loss of appetite
12 13%
Breathing problems
11 12%
Liver problems
10 11%
Itching
8 8.4%
Excessive thirst
7 7.4%
Kidney problems
7 7.4%
Restlessness or agitation
5 5.3%
Behaviour change
5 5.3%
Abdominal pain
5 5.3%
Excessive urination
4 4.2%
Fever
4 4.2%
Allergic reaction
4 4.2%

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
9 9.5%
Didn't stop worms
4 4.2%
Didn't stop fleas
4 4.2%
Didn't prevent heartworm
1 1.1%

How soon problems started

Same day
10 19%
1–2 days
3 5.8%
3–7 days
4 7.7%
1–4 weeks
12 23%
Over a month
23 44%

Time from the first dose to the first sign, where both dates were reported (52 reports).

How the animals did

Recovered
39 41%
Still unwell when reported
18 19%
Died
2 2.1%
Euthanised
8 8.4%
Not known
28 29%

Breeds named most often

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

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