Loss of appetite after Doxycycline in cats

86 reports to the FDA describe loss of appetite in cats given Doxycycline. That is 33% of all reports for this medicine, compared with 14% across reports for all cat medicines, so it is reported unusually often with this medicine.

86Reports
71%Marked serious
15%Recovered
36%Died or euthanised
10 daysTypical onset
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How soon it started

Same day
13 17%
1–2 days
12 16%
3–7 days
11 14%
1–4 weeks
23 30%
Over a month
17 22%

How the animals did

Recovered
13 15%
Still unwell when reported
26 30%
Died
11 13%
Euthanised
20 23%
Not known
16 19%

Problems reported at the same time

Age of the animals

Under 1 year
8
1–3 years
19
4–7 years
25
8–11 years
17
12+ years
15

About this medicine

Doxycycline treats bacterial and tick-borne infections.

Questions owners ask

Can Doxycycline cause loss of appetite in cats?
86 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 10 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 cats · Medicines most reported with loss of appetite