No one said they don't work.  What I said was that it is a fallacy that they
do not have addictive potential.  A drug with the potential to cause
addiction is supposed to be classified as a controlled drug by the DEA.  A
good example of one that was not classified as controlled which  recently
became a controlled drug is Stadol.

We are getting more and more reports in the UK from people who are
having withdrawal problems, it was originally an east German drug and
came over when the wall came down. Prescribing in the UK is rising
quickly, so I suppose the more people who take the more problems come to
light. Our local PCT is trying to persuade doctors to think twice, but
we need more evidence to evaluate both benefit and risk.