Medication error after Diphenhydramine in dogs

30 reports to the FDA describe medication error in dogs given Diphenhydramine. That is 0.6% of all reports for this medicine, compared with 0.6% across reports for all dog medicines.

30Reports
83%Marked serious
27%Recovered
10%Died or euthanised
1 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
12 43%
1–2 days
7 25%
3–7 days
3 11%
1–4 weeks
1 3.6%
Over a month
5 18%

How the animals did

Recovered
8 27%
Still unwell when reported
17 57%
Died
3 10%
Not known
2 6.7%

Problems reported at the same time

Age of the animals

Under 1 year
5
1–3 years
9
4–7 years
7
8–11 years
5
12+ years
4

About this medicine

Type: medicine.

Questions owners ask

Can Diphenhydramine cause medication error in dogs?
30 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).

Medication error with similar medicines

All reported side effects of Diphenhydramine in dogs · Medicines most reported with medication error