Loss of appetite after Doxycycline in dogs

The FDA has received 691 reports of loss of appetite in dogs after Doxycycline. That is 17% of all reports for this medicine, compared with 8.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

691Reports
73%Marked serious
10%Recovered
34%Died or euthanised
15 daysTypical onset
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How soon it started

Same day
64 11%
1–2 days
65 11%
3–7 days
92 16%
1–4 weeks
126 22%
Over a month
222 39%

How the animals did

Recovered
64 9.3%
Recovered with lasting effects
6 0.9%
Still unwell when reported
288 42%
Died
90 13%
Euthanised
145 21%
Not known
98 14%

Problems reported at the same time

Age of the animals

Under 1 year
24
1–3 years
172
4–7 years
210
8–11 years
196
12+ years
80

About this medicine

Doxycycline treats bacterial and tick-borne infections.

Questions owners ask

Can Doxycycline cause loss of appetite in dogs?
691 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).

Loss of appetite with similar medicines

All reported side effects of Doxycycline in dogs · Medicines most reported with loss of appetite