Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not worth the risk

I'm always amazed that this product is still legal and that people purchase it. I've worked at numerous vet hospitals and dog after dog visit emergency rooms due to reactions to this product. If you're thinking, "any topical product has risk of adverse reactions", consider that I never once saw a dog at the ER due to Frontline or Advantage. Yes, these brands are pricey, but for an obvious reason. A trip to an emergency hospital will cost you a lifetime's supply of Frontline or Advantage. And money aside, my dog's health and comfort are not worth that risk.