I started using Cold FX a little over a year ago, I found it to work quite well. I would even take one a day when I wasn't sick. Then recently when I felt a cold coming on I went to Wal Mart to buy some Cold FX and found something called Cold Attack,(it was next to the Cold FX) which was quite a bit less expensive and It worked WONDERFULLY.
Then 3 weeks ago I went to buy some more cold attack and they didnt have any in stock so I bought Echinacea 1000mg tablets by Swiss. They are great to, and are basically what the Cold attack are made from.
So what I am trying to say is...the cold FX works, but the Cold attack and the Echinacea also work and are much less expensive.
JMHO