Can pet anxiety medication cause seizures or severe side effects?
Hello and welcome to Petco Pet Education Center, formerly Petcoach. All medications have side effects and possible adverse reactions. Anti-anxiety medication, depending on which one, can be hard on the liver, depending on the medication, dose and frequency it is being used. Most anti-anxiety medications will depress the brain so tend to not cause seizures, but they do affect the brain so some animals can respond with seizures, but this is unlikely. Most of these medications will cause sedation, and the equivalent to 'drowsiness' that a human might feel. If you are seeing seizures or lethargy/weakness with the medications I recommend having your dog seen by a vet and checking blood levels. Also, I notice you have your dog listed as unneutered. If your dog is having anxiety, getting him neutered can help reduce stress and anxiety and would be recommended as part of an anti-anxiety treatment plan. Discuss this with your vet. Best of luck with Bruno.
Updated on September 23rd, 2025