question: Will valium become more effective over time? I know it is supposed to work instantly, yet I have been going up and down on doses for a few weeks now as I dont want to be on them.  I do ok taking 5mg at night for a week, and then try to stop, or lower the dose, and end up a few days later needing 20mg just to stop a night time anxiety attack. Then I drop back to the 5mg for awhile do ok for a week, and again try to lower or stop...and the cycle continues.  Is it better to just keep taking it at 5mg daily no matter what and leave it alone for awhile...husband and some web sites say that valium will become more effective if I take it daily to build up the same level in my body.