On September 19, a psychotherapist offered 12 patients drugs for a group session in his Hermsdorf neighbourhood home. Nine patients accepted at least one of the two drugs - Ecstasy and ephedrine. But things went wrong and the two men aged 28 and 59 died. A third 55-year-old man fell into a coma.
According to Berliner Morgenpost he has now since awoken and his condition is improving.
The doctor was arrested after the deaths and remains in police custody on suspicion of two counts of bodily harm with fatal consequences and six counts of dangerous bodily harm.
A sign in front of the doctor's office offered special psychiatric treatments including psychoactive substances. These reportedly included LSD and psychedelic mushrooms, which are illegal in Germany.
Berliner Morgenpost reported that members of the therapy group had been offered the drugs at previous sessions and knew what they were doing.