Loss of appetite after Methadone in dogs

68 reports to the FDA describe loss of appetite in dogs given Methadone. That is 29% of all reports for this medicine, compared with 8.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

68Reports
88%Marked serious
10%Recovered
46%Died or euthanised
2 daysTypical onset
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How soon it started

Same day
10 17%
1–2 days
20 34%
3–7 days
7 12%
1–4 weeks
7 12%
Over a month
14 24%

How the animals did

Recovered
6 8.8%
Recovered with lasting effects
1 1.5%
Still unwell when reported
19 28%
Died
6 8.8%
Euthanised
25 37%
Not known
11 16%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
10
4–7 years
13
8–11 years
28
12+ years
11

About this medicine

Type: medicine.

Questions owners ask

Can Methadone cause loss of appetite in dogs?
68 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 2 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 Methadone in dogs · Medicines most reported with loss of appetite