This is one of the most dangerous aspects of Scientology.  This is a direct passage from the book (or sci-fi novel as it should be called) "What Is Scientology?: A Guidebook To The World's Fastest Growing Religion" by The Church Of Scientology

  On the purification program, running is done to get the blood circulating deeper into the tissues where toxic residuals are lodged and thus act to loosen and release the accumulated harmful deposits and get them moving

   Very important, then, is that the running is immediately followed by sweating in the sauna to flush out the accumulations which have now been dislodged.

   Regular nutrition and supplemental nutrition in the form of mega-vitamin and mineral dosages and extra quantities of oil are a vital factor in helping the body to flush out toxins and to repair and rebuild the areas that have been affected by drugs and other toxic residuals.

   A proper schedule with enough rest is mandatory as the body will be undergoing change and repair throughout the program.

   The Purification program addresses the biochemical aspects of drugs and toxins.  From a personal standpoint, however, there are other factors to consider, mental and spiritual ones.

   L. Ron Hubbard solved the mental and spiritual harm that drugs do with a series of actions comprising what is called the "Drug Rundown".  A rundown designates a series of related actions in Scientology which culminate in a specific end result.  In this case, the Drug Rundown consists of the auditing process and actions necessary for an individual from the damaging mental and spiritual effects of drugs.  The Drug Rundown is delivered in churches and missions by highly trained auditors.

   A person who has been on drugs often becomes disassociated from the world around him or even his physical self, as evidenced by the neglect many drug takers show on their hygiene, dress, health, job, friends and family, etc.

   The reason is that, among other things, drugs dull a person's communication.  This is most directly observed in the action of painkillers, which shut off a person's feeling of pain, but it occurs with the use of other drugs as well/  Emotions are suppressed with drug use, and perceptions become altered or shut off.  A person often becomes less aware of things and people around him and so becomes less considerate and responsible, less active, less capable, and less bright.  The person factually becomes less conscious of what is happening in the present.  One does not have to have been a heavy narcotics addict to experience a lessening of alertness, fogginess or other effects as a result of drug use.

   Drugs do something else too: they stick a person's attention at points in his past.  Mental image pictures restimulated from the reactive mind appear in the visions of hallucinations a person sees while on certain drugs.  Attention often becomes stuck in these pictures after the drug has worn off, with the cumulative effect of the person not feeling "with it" or not feeling in the present time.

   This can be dangerous to the person himself and to others, as seen in the number of drug-related automobile accidents that occur, to say nothing of less serious accidents of goofs that happen because a person is unaware of what is going on around him.  Drug use makes a person less alert mentally, can harm memory and has a host of other effects on attitudes and behavior- all residual consequences of the drugs, which persist indefinitely unless audited.

   The spiritual effects of drug use can also be devastating.  In the late 1960s, L. Ron Hubbard discovered that a person who had been heavily on drugs was not able to make spiritual gains from auditing.  This condition had not been encountered earlier in his researches, as drugs had not yet encroached so deeply into society.  But, it became more and more prevalent and required a solution, as drugs now represent an increasingly serious block to self-betterment efforts.

   The reason drugs are so harmful spiritually is because they can badly scramble the energy contained in the mind, disorienting and confusing the person.  His awareness often diminishes and his capabilities of dealing with the energies and masses of reality become less.  A person affected by drugs is less able to control the things in his environment and, despite whatever subjective feelings he may have to the contrary, he becomes less powerful and less able.

   While on drugs, the pictures in the reactive mind can violently turn on, overwhelming the being and making him afraid to confront anything in the reactive mind thereafter.  As a result, the person is stopped dead from any mental spiritual gain.

   Through the different auditing processes and drills of the Drug Rundown, a person is first brought to new awareness of his environment and the world around him.  This has the effect of unsticking him from points in his past and brings him more into present time.

   This is a very important factor in mental and spiritual ability.  The more a person can exist in the present without his attention stuck in past incidents. the better he is able to deal with his life.  He feels brighter, his increased perception and the things in his environment, and becomes more able to deal with others.\

   Getting the person into present time is not the total answer, however.  The actual incidents from his reactive mind associated with drugs must also be addressed in auditing.  Drugs scramble the mind to such a degree that freeing the individual from these effects requires a precise and thorough approach.

   First, experiences the person has while taking drugs are addressed using exact auditing procedures, and the charge in the reactive mind which has accumulated around these incidents is released.  Attention that has been fixated by drugs, medicines and alcohol is freed, and the mental images brought about by drugs are erased.

   Drug taking invariably has numerous unwanted physical sensations, emotions, attitudes and other feelings connected with it.  So the next stage of a Drug Rundown entails auditing on unwanted feelings connected with specific drugs taken by the person.  These are addressed one by one and fully handled, freeing the person from their effects.

   L. Ron Hubbard found, though, that people begin taking drugs for a reason: to ease the agony of a physical condition, to numb themselves against certain situations in their lives, to relieve boredom, to feel better, the number of possible reasons is as great as the number of people taking drugs.  By taking drugs, the person was trying to handle or cure something.  At the bottom, then, the drug problems essentially spiritual.  The being in some way hurt and was led the false solution that drugs could cure this.  The solution, as many learned the hard way, turned out to be a trap from which there was no true escape until the drug-handling technology of L. Ron Hubbard.

   A vital part of the Drug Rundown, then, includes finding the pains, emotions, sensations, feelings, etc., the person was suffering from- for which drugs became the cure.  When these are found, each is addressed in auditing.  Unless the reasons a person went onto drugs in the first place are resolved, the person is forever left with the original condition for which drugs were a "solution".

   When the original problem has been addressed , the person himself is at least free from any effects of drugs and free from the need to take them.  The full solution of the drug problem thus consists of handling all aspects of drug taking.

   On Earth today, drugs are very, very big business.  We live in a society where human values are routinely shunted aside by the economic concerns connected with drugs both legal and illegal.  The cost in crime, the cost in trying to control the problem,  the cost in inefficiency, the cost simply in lives lived under the numbing influence of drugs cannot be calculated.  For to do that, one would have to put a price on life itself.

   So, what price the headache remedies, the soporifics, the pain relievers. the anti-depressants that fill our medicine cabinets?  What price the anphetimines given our school children, turning them into drug-dependent people?  What price the narcotics that are used to negate a painful exisistance?  What price the recreational drugs that provide escape from the boredom of affluence?  What price these shackles that keep from us the sensations and joys of living itself?

   A drug war rages on this planet.  L. Ron Hubbard recognized the drug problem long before it became an international concern.  And he developed a technology people can use to free themselves from this trap and remain free of it.

   His technology is the weapon that can win this war

Pretty frightening, huh?