I have had several trials with Zicam. I bought the nasal gel, and not reading the instruction carefully I was sucking up all the way into my nostrils. It still worked though. The thrid time a felt a cold coming I immediately started using the product. For two or three days I was still feeling lousing, then the next morning, I woke and it was gone. I said this is great and stopped taking the Zicam gel. Sure enough three days later the same cold came back. Frustrated, I started the Zicam again and did some research on the internet and realize that the zicam does not kill the existing virus in your body, just prevents it from replicating itself. So the existing viruses in your body will continue to make you feel like shit, but they eventualy die. I also found out that you need to take Zicam for at least 48 hours after your sympton go away. This is to insure the remaining viruses do not survive. So in my humble opinion. This products works well, but follow the instructions. Thanks
