Side effects


Side effects are effects of a medication that are not those intended. Your vet may advise you of any side effects to look out for that are specific to a particular medication. They will tell you what to do if these side effects occur. However, as for people, some medications just don’t suit certain individuals and you may see an allergic type reaction or they may make your animal sick or have diarrhoea. Always consult your vet if you are worried about any changes since you started giving a medication. They may be able to suggest a different product that will suit your pet better. Below are some possible side effects of particular types of medication but others may occur in individual animals.


Type of medication / Possible side effects



Allergic type reactions including skin rash, similar to penicillin allergy in people. Sickness and/or diarrhoea.


Non-steroidal anti-inflammatory drugs (NSAIDs):

Sickness and/or diarrhoea.



Drinking more and urinating more. Increased appetite.


Shampoos and topical treatments:

Allergic type reaction at the place where it is used which may look red or irritated.


Remember: always consult your vet if you think your pet may be suffering side effects from a medication.



Disclaimer:  This website has been designed to offer information surrounding the use of antibiotics and infection control for pet owners.  It does not replace advice from your veterinary surgeon.  If you believe your pet is unwell or you have any questions relating to their treatment, please always contact your veterinary surgeon for advice.