Loss of appetite after Phenobarbital in dogs

160 reports to the FDA describe loss of appetite in dogs given Phenobarbital. That is 10% of all reports for this medicine, compared with 8.4% across reports for all dog medicines.

160Reports
74%Marked serious
23%Recovered
23%Died or euthanised
11 daysTypical onset
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How soon it started

Same day
23 26%
1–2 days
12 13%
3–7 days
6 6.7%
1–4 weeks
16 18%
Over a month
33 37%

How the animals did

Recovered
29 18%
Recovered with lasting effects
8 5.0%
Still unwell when reported
49 31%
Died
9 5.6%
Euthanised
27 17%
Not known
38 24%

Problems reported at the same time

79 49%
60 38%
51 32%
37 23%
31 19%
22 14%

Age of the animals

Under 1 year
1
1–3 years
14
4–7 years
37
8–11 years
47
12+ years
58

About this medicine

Type: medicine.

Questions owners ask

Can Phenobarbital cause loss of appetite in dogs?
160 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.
How soon after a dose was it reported?
In half of the reports with dates, it started within 11 days of the first dose.
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).

Loss of appetite with similar medicines

All reported side effects of Phenobarbital in dogs · Medicines most reported with loss of appetite