Didn't prevent heartworm after Distemper-parvo Vaccine in dogs

The FDA has received 127 reports of didn't prevent heartworm in dogs after Distemper-parvo Vaccine. That is 2.0% of all reports for this medicine, compared with 13% across reports for all dog medicines, so it is reported less often than average with this medicine.

127Reports
24%Marked serious
3.1%Recovered
3.1%Died or euthanised
178 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
1 2.1%
1–2 days
1 2.1%
3–7 days
1 2.1%
1–4 weeks
5 10%
Over a month
40 83%

How the animals did

Recovered
2 1.6%
Recovered with lasting effects
2 1.6%
Still unwell when reported
14 11%
Died
2 1.6%
Euthanised
2 1.6%
Not known
105 83%

Problems reported at the same time

Weight gain
16 13%
Didn't work as expected
15 12%
Vomiting
14 11%
Liver problems
11 8.7%
Cough
10 7.9%
Behaviour change
9 7.1%
Drug dose omission
8 6.3%
Loss of appetite
7 5.5%

Age of the animals

Under 1 year
9
1–3 years
77
4–7 years
32
8–11 years
6
12+ years
3

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 didn't prevent heartworm in dogs?
127 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 178 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).

Didn't prevent heartworm with similar medicines

All reported side effects of Distemper-parvo Vaccine in dogs · Medicines most reported with didn't prevent heartworm