Blood in stool after Doxycycline in dogs

30 reports to the FDA describe blood in stool in dogs given Doxycycline. That is 0.7% of all reports for this medicine, compared with 0.6% across reports for all dog medicines.

30Reports

87%Marked serious

6.7%Recovered

40%Died or euthanised

38 daysTypical onset

How soon it started

Same day

1 3.8%

1–2 days

2 7.7%

3–7 days

3 12%

1–4 weeks

7 27%

Over a month

13 50%

How the animals did

Recovered

2 6.7%

Still unwell when reported

14 47%

Died

2 6.7%

Euthanised

10 33%

Not known

2 6.7%

Problems reported at the same time

17 57%

17 57%

14 47%

14 47%

13 43%

12 40%

11 37%

9 30%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Doxycycline treats bacterial and tick-borne infections.

Questions owners ask

Can Doxycycline cause blood in stool 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 38 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).

Blood in stool with similar medicines

Blood in stool after Amoxicillin + Clavulanate (Clavamox) 75 reports · 1.4% of its reports
Blood in stool after Cefovecin (Convenia) 38 reports · 1.0% of its reports
Blood in stool after Enrofloxacin (Baytril) 43 reports · 1.1% of its reports
Blood in stool after Metronidazole 79 reports · 2.6% of its reports
Blood in stool after Amoxicillin 23 reports · 1.7% of its reports

All reported side effects of Doxycycline in dogs · Medicines most reported with blood in stool