Nausea after Metronidazole in dogs

The FDA has received 56 reports of nausea in dogs after Metronidazole. That is 1.8% of all reports for this medicine, compared with 0.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

56Reports

59%Marked serious

25%Recovered

8.9%Died or euthanised

1 daysTypical onset

How soon it started

Same day

14 34%

1–2 days

9 22%

3–7 days

2 4.9%

1–4 weeks

5 12%

Over a month

11 27%

How the animals did

Recovered

13 23%

Recovered with lasting effects

1 1.8%

Still unwell when reported

26 46%

Died

2 3.6%

Euthanised

3 5.4%

Not known

11 20%

Problems reported at the same time

29 52%

28 50%

27 48%

23 41%

19 34%

13 23%

12 21%

11 20%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Metronidazole treats some bacterial and parasitic gut infections.

Questions owners ask

Can Metronidazole cause nausea in dogs?: 56 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).

Nausea with similar medicines

Nausea after Amoxicillin + Clavulanate (Clavamox) 55 reports · 1.0% of its reports
Nausea after Doxycycline 21 reports · 0.5% of its reports
Nausea after Cefovecin (Convenia) 44 reports · 1.2% of its reports
Nausea after Enrofloxacin (Baytril) 30 reports · 0.8% of its reports

All reported side effects of Metronidazole in dogs · Medicines most reported with nausea