The cat's lack of energy and lethargy after external deworming may be caused by the cat's inability to adapt or the irritation of the drug to the cat. Generally, it will get better in about a day. If it does not improve, or the cat has vomiting and diarrhea, it may be that the cat is not Be careful of accidentally ingesting anthelmintics. If poisoning occurs, it is best to take your cat to a pet hospital for examination and treatment.
Tip:
It is best to drop the external deworming agent on the back of the neck to prevent the cat from licking it.