Why are Mental Health Professionals "Clearing" Drugs?

One of the latest pseudoscientific fads in mental health is the idea that various psychological problems are caused or made worse by so-called "toxins".  This is very prominent in Callahan's TFT (CTTFT).  A "toxin" can be any common food or drink in a person's diet, or it can be a drug or vitamin a person is taking. Callahan believes that the main cause of positive treatment results not lasting over time is the exposure to such a "toxin" which undoes a successful treatment. He also believes toxins can be responsible if a person fails to respond at all to a treatment. So "toxins" easily become a way to explain away failures.

Over the past several years, toxins have become an increasing obsession amongst CTTFT devotees.  There are people doing Voice Technology who call on the telphone to have practically everything they eat checked and this can get quite expensive at $600 per hour!  More recently, there has been the claim that their toxin treatment can alleviate unpleasant side effects from drugs.  One practitioner even stated recently on a list serv that she routinely checks all drugs a person is taking at the start of treatment to see if they test as toxins and then "clears" them.

So imagine having recurring panic attacks, going to a licensed therapist for help, and having that person ask you to make a list of all the drugs you are taking so they can be "cleared".  Is this an appropriate practice for a licensed mental health practitioner to be involved in?  This is beginning to sound more and more like Scientology.  They've been doing drug "clearings" for over 30 years now, so it seems that L. Ron Hubbard beat the CTTFT folks to this practice by a long shot.  Of course, Callahan proponents will claim that their "clearing" is far superior to Scientology but what evidence do they have that is any different from the kinds of evidence Scientologists provide.  Both rely on anecdotes and testimonials.  The only difference I can see is that Scientology has a lot more of them, over a longer period of time.

What I want to know is how long are these sorts of practices by licensed mental health professionals going to be tolerated by the mental health professions?