John......thank you for laying it out for everyone. I am pretty excited about this as you can tell. The response that stops the itch is prompt and any time I can get 6 hours without the itch is heavenly. So....yes it is temporary and that is o.k. I did have time to use a second dose and my "sample itch" is now gone for good. This will become a "don't leave home without it" medication for me.