Doxycycline side effects in Labrador Retrievers

331 FDA reports involve Doxycycline in a Labrador Retriever. These are the problems they describe.

Didn't prevent heartworm
105 32%
Lethargy
71 21%
Vomiting
69 21%
Loss of appetite
67 20%
Death
60 18%
Liver problems
57 17%
Didn't work as expected
48 15%
Blood problems
44 13%
Weight loss
31 9.4%
Swelling
30 9.1%
Fever
29 8.8%
Breathing problems
26 7.9%

All reports for Doxycycline in dogs