My cat is lethargic and not eating 3 weeks after Bravecto. Why?

Question

I treated my cat with the Bravecto flea and tic prevention around 3 weeks ago (solution squeezed on back of head) and has been very lethargic ever since. Reduced appetite, sleeps most of day and night. Very much not himself - seems to have no energy. This seems like a long time to be like that. Cat is nearly 13 years old. Pet's info: Cat | Birman | Male | neutered

Ana M, DVM · Accepted Answer

Thank you for submitting your question regarding Kirby. I recommend that he sees his veterinarian. While any medication can cause side effects, three weeks is a long time for him not to be feeling well. His veterinarian will examine him and determine if laboratory work is necessary. From there, treatment can be started to help him feel better. I hope this information helps!

My cat is lethargic and not eating 3 weeks after Bravecto. Why?

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