[Ellie May]

I can't tell you if it is the Advantix causing him to throw up but I do know that Advantix can have some nasty side effects. On extremely rare occasions the permathrin (the pesticide used to kill mosquitos used in Advantix) can cause death. It is also a possilbe carcinogen. When we told Ellie's vet about our concerns she said that people who have tested/tried Advantix say it feels like bugs crawling all over you. She recommended Frontline (but that doesn't work well for some people on YT). No more Advantix for us. Maybe they have side effects on their website.