Decreased haemoglobin after Distemper-parvo Vaccine in dogs

32 reports to the FDA describe decreased haemoglobin in dogs given Distemper-parvo Vaccine. That is 0.5% of all reports for this medicine, compared with 0.1% across reports for all dog medicines, so it is reported unusually often with this medicine.

32Reports
94%Marked serious
19%Recovered
31%Died or euthanised
14 daysTypical onset
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How soon it started

Same day
4 13%
1–2 days
3 10%
3–7 days
5 17%
1–4 weeks
9 30%
Over a month
9 30%

How the animals did

Recovered
6 19%
Still unwell when reported
10 31%
Died
2 6.3%
Euthanised
8 25%
Not known
6 19%

Problems reported at the same time

Loss of appetite
22 69%
Decreased red blood cell count
21 66%
Lethargy
18 56%
Liver problems
18 56%
Blood problems
15 47%
Kidney problems
14 44%
Neutrophilia
13 41%
Monocytosis
12 38%

Age of the animals

Under 1 year
16
1–3 years
4
4–7 years
4
8–11 years
6
12+ years
2

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 decreased haemoglobin in dogs?
32 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 14 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).

Decreased haemoglobin with similar medicines

All reported side effects of Distemper-parvo Vaccine in dogs · Medicines most reported with decreased haemoglobin