I got the Hartz product for my cats that kills fleas, flea larvae and flea eggs. I never had a problem until the purple squeeze tube opened when I cut it and got some on my hands. Over the next day or so, I got sick. I felt flu-like symptoms but with no fever. Groggy, somewhat nauseous, sore throat. Took Tylenol and went to bed. I sure hope there are no long-term effects!!