Ask a Dog Vet and Get Answers to Your Dog Veterinary Questions
Welcome and thanks for asking your question. My name is***** am a licensed veterinarian. I am not set up to make a live call. But, I am happy to answer your question on this thread. First I need to ask you a few questions so that I can be well informed and give you the best advice.
1- Any vomiting, diarrhea, etc.
2- Is he breathing any differently?
3- Any other symptoms?
Friend, lethargy is not a common side effect to Kesium. Typically side effects would be affecting the gastrointestinal tract like vomiting or diarrhea. Less likely it can affect the blood causing things like: Anemia, decreasing certain groups of white blood cells, etc. It is possible there could be something else going on unrelated to the antibiotics. However, when dealing with biological systems there are always exceptions, I would stop the antibiotics for 24 hours and see if he returns to normal. In addition, consider a recheck with family vet to make certain there is nothing else going on.
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