I hope you have taken your cat to the vet by now. Collapsing is not normal. Actually I knew one of my cats was quite sick and one day she collapsed and laid there, just looking at me. I picked her up and she seemed fine. I don't want to scare you with the details of her illness, but I would take your cat to the vet and have him checked out.View Thread
The majority of comments are from dog owners, but cats react to Vectra too. I have two 9 month old Maine Coon kittens with fleas. Our vet gave us Vectra for cats and we used it the first time last month. At that time Twink weighed in for the low dose, while Lilly got the higher dose. Last month Lilly became anxious, running nervously around. She would settle down for about 1/2 hour. Last month Twink did have a reaction, but this month, with the higher dosage, she had the same reaction as Lilly. If the fleas are not gone next month I am not using Vectra again. I'm afraid I have done a terrible thing to my kittens and I hope there is not permanent damage to their health. An hour later they have settled down. I hate to hear so many pet owners having to watch their pets behave in such uncharacteristic ways due to this med. I will talk to my vet about the reaction and I'll find something else that is not systemic to take care of the fleas.View Thread
The opinions expressed in WebMD User-generated content areas like communities, reviews, ratings, or blogs are solely those of the User, who may or may not have medical or scientific training. These opinions do not represent the opinions of WebMD. User-generated content areas are not reviewed by a WebMD physician or any member of the WebMD editorial staff for accuracy, balance, objectivity, or any other reason except for compliance with our Terms and Conditions. Some of these opinions may contain information about treatments or uses of drug products that have not been approved by the U.S. Food and Drug Administration. WebMD does not endorse any specific product, service, or treatment.
Do not consider WebMD User-generated content as medical advice. Never delay or disregard seeking professional medical advice from your doctor or other qualified healthcare provider because of something you have read on WebMD. You should always speak with your doctor before you start, stop, or change any prescribed part of your care plan or treatment. WebMD understands that reading individual, real-life experiences can be a helpful resource, but it is never a substitute for professional medical advice, diagnosis, or treatment from a qualified health care provider. If you think you may have a medical emergency, call your doctor or dial 911 immediately.