Closely watch your dog for any unusual changes after starting amoxicillin. Note any vomiting or diarrhea – these are common side effects. Frequency and severity matter; a single episode might be unrelated, but persistent vomiting or diarrhea warrants immediate veterinary attention.
Gastrointestinal Issues
Changes in appetite are also important to observe. Reduced food intake or refusal to eat could signal a problem. Monitor stool consistency – is it looser than usual, or is there blood present? Document these observations, noting the time and severity.
Allergic Reactions
Allergic reactions can manifest as skin rashes, itching, or hives. Less commonly, swelling of the face, lips, or tongue (angioedema) can occur – this is a serious condition requiring immediate veterinary care. Observe your dog carefully for any unusual skin changes or breathing difficulties.
Any sign of lethargy, unusual behavior, or difficulty breathing requires immediate veterinary attention. Don’t hesitate to contact your vet if you have any concerns, no matter how small they may seem. Your vet can advise on managing side effects or considering alternative treatments.
Other Potential Side Effects
While less frequent, observe for changes in urination or behavior. Increased thirst or urination could indicate kidney issues, and changes in temperament – such as increased anxiety or aggression – may also be linked to medication. Keep a detailed record of any changes. This aids your vet in assessing the situation and ensuring your dog receives optimal care.


