Decreased haematocrit after Distemper-parvo Vaccine in dogs

37 reports to the FDA describe decreased haematocrit in dogs given Distemper-parvo Vaccine. That is 0.6% 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.

37Reports
86%Marked serious
19%Recovered
32%Died or euthanised
15 daysTypical onset
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How soon it started

Same day
2 5.6%
1–2 days
8 22%
3–7 days
5 14%
1–4 weeks
11 31%
Over a month
10 28%

How the animals did

Recovered
7 19%
Still unwell when reported
13 35%
Died
2 5.4%
Euthanised
10 27%
Not known
5 14%

Problems reported at the same time

Age of the animals

Under 1 year
23
1–3 years
1
4–7 years
9
8–11 years
3
12+ years
0

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 haematocrit in dogs?
37 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 15 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 haematocrit with similar medicines

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