Guichet: drug use in medicine

Cannabis, ketamine, MDMA, LSD or psilocybin... all substances considered to be drugs also have physical and mental health benefits: in particular, they can be used to treat chronic pain, depression, post-traumatic stress or addiction problems. In Switzerland, their use is authorized within a clearly defined therapeutic framework. Who can benefit, and under what conditions? Are there any risks involved? Are these treatments reimbursed?