4. AlcoholIt’s not funny to give a cat alcohol. This refers to both ethanol alcohol, drinking alcohol and grain alcohol used in products. Be especially careful with cleaning products that contain alcohol as well as It will affect their nervous system and symptoms of alcohol poisoning in cats might include lethargy, vomiting, seizures, or coma. Do not leave cocktails on the counter if you have cats. Also do not use flea sprays that are alcohol based.