Loss of appetite after Distemper-parvo Vaccine in cats

The FDA has received 63 reports of loss of appetite in cats after Distemper-parvo Vaccine. That is 23% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

63Reports
75%Marked serious
30%Recovered
16%Died or euthanised
1 daysTypical onset
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How soon it started

Same day
23 38%
1–2 days
16 26%
3–7 days
9 15%
1–4 weeks
7 11%
Over a month
6 9.8%

How the animals did

Recovered
17 27%
Recovered with lasting effects
2 3.2%
Still unwell when reported
13 21%
Died
2 3.2%
Euthanised
8 13%
Not known
21 33%

Problems reported at the same time

Lethargy
34 54%
Vomiting
21 33%
Drooling
13 21%
Behaviour change
12 19%
Diarrhea
11 17%
Weight loss
10 16%
Dehydration
10 16%
Death
10 16%

Age of the animals

Under 1 year
11
1–3 years
16
4–7 years
10
8–11 years
10
12+ years
15

About this medicine

Type: vaccine.

Mild, short-lived lethargy, soreness or a small lump at the injection site are the most commonly reported vaccine reactions.

Questions owners ask

Can Distemper-parvo Vaccine cause loss of appetite in cats?
63 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 1 day 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 Distemper-parvo Vaccine in cats · Medicines most reported with loss of appetite