I haven't tried that one but did try one that works and fast.
My wife was bit a few weeks ago and after 5 days she was in extreme pain and the doctor said she would probably have to have surgery to remove dead tissue. I found a site that claimed to have a cure that would clear it up in 4 or 5 days. I didn't believe it but we didn't have anything to lose so we tried it and it took the pain away in 2 hours and and in 4 days the bite was nearly gone. The doctor couldn't believe it and asked for the site address. This site is free and the cure grows in everyones yard.