What is Scientology’s view on drugs and medicine?
Scientologists do use prescribed medical drugs when physically ill and also rely on the advice and treatment of medical doctors. Scientologists do not take street drugs or mind-altering psychotropic drugs.
They consider drugs cause extremely damaging effects on a person—physically, mentally and spiritually. Specifically, that drugs decrease awareness and hinder abilities. They are a “solution” to some other problem, but ultimately prove an even bigger problem.
Mr. Hubbard developed an entire body of technology to enable individuals to recover from the harmful mental and spiritual effects of drugs, including the Purification Rundown  His discoveries in this field are also widely used in the secular world, particularly in the international network of Narconon  drug rehabilitation centers.