Breathing problems after Doxycycline in dogs

The FDA has received 335 reports of breathing problems in dogs after Doxycycline. That is 8.3% of all reports for this medicine, compared with 2.7% across reports for all dog medicines, so it is reported unusually often with this medicine.

335Reports
78%Marked serious
15%Recovered
32%Died or euthanised
15 daysTypical onset
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How soon it started

Same day
61 22%
1–2 days
28 10%
3–7 days
38 14%
1–4 weeks
44 16%
Over a month
109 39%

How the animals did

Recovered
46 14%
Recovered with lasting effects
4 1.2%
Still unwell when reported
132 39%
Died
44 13%
Euthanised
63 19%
Not known
46 14%

Problems reported at the same time

Age of the animals

Under 1 year
8
1–3 years
101
4–7 years
93
8–11 years
81
12+ years
49

About this medicine

Doxycycline treats bacterial and tick-borne infections.

Questions owners ask

Can Doxycycline cause breathing problems in dogs?
335 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).

Breathing problems with similar medicines

All reported side effects of Doxycycline in dogs · Medicines most reported with breathing problems