In this video, Dr. Justine Lee, DACVECC, DAVT, emergency critical care and toxicology specialist, discusses flea and tick medication poisoning in cats. You should NEVER apply a dog flea and tick topical medication to your cat without a) carefully reading the instructions, b) confirming with your veterinarian. That's because high-concentration topical flea and tick medications made of pyrethroids/pyrethrins can be deadly to cats. While these products are safe for dogs, pyrethrins/pyrethroids can cause severe foaming of the mouth, tremoring, seizures, hyperthermia, clotting abnormalities, and death in cats. When in doubt, contact your veterinarian, your emergency veterinarian, or the ASPCA Animal Poison Control Center at (888) 426-4435 for life-saving advice. You can also try calling the company that makes the flea and tick medication if you're noticing any problems at all too! For more information, check out Dr. Justine Lee's blog at www.drjustinelee.com. Disclaimer: Please note that this content has been made available for informational and educational purposes only. This content is not intended to be a substitute for professional advice, diagnosis, or treatment. Do not delay treatment based on this content, and when in doubt, seek veterinary professional advice!