This is the story, I checked it on snopes.com, and it's classified undetermined and research is being done into it. I realise a lot of flea treatments can cause adverse reactions, but I'd stay away from it until more testing is done.
Hi Everyone- the following message is very important. If you don't have a pet, please pass this on to anyone you know who may have a cat or dog....very important. Please alert others to the hazard of using a new Flea & Tick Preventative called ProMeris http://www.promeris.com/consumer/
This is a new product designed to be a more effective product than other flea/tick treatments that was just released this year. It is available thru a vet and not currently on-line. I got ProMeris this week for my 7 dogs (6 Huskies & 1 Golden-Airedale), and the results were debilitating for nearly all of them-including me. Since my incident this week, my vet has pulled it from distribution and alerted the manufacturer, Fort Dodge.
Here are my results: Within less than 2 hours after applying, 4 of my dogs had vomited from 2-4 times, 3 were disoriented and stumbling, 1 was dragging his back leg, 1 was salivating. I had very similar symptoms like an allergic reaction-my lips were swollen, eyes very red, mucous membranes such as eyes, nose, and mouth were stinging. I was very disoriented-dizzy equilibrium and not able to drive. To make this a short story-all 7 of my dogs were admitted to the hospital for veterinarian care, and 3 of them remained for care, IV fluids and observation for 24 hours. I was in the emergency room. I'm home now and so are the dogs. We're all feeling much better. Vet bills were over $2,500 and Fort Dodge is paying for these. Not only can the product cause this reaction, it has a highly noxious odor that permeated the house and is just starting to dissipate after 3 days.
Your dogs/cats might not have the same reaction, but given my experience-I wanted to help you all become well-educated about the product.