Just to confirm, for experts Dr's and moderators? Does this stuff actually work for mental health in long term or basically just the same as a few beers on weekends? Will this actually work for someone who tried to commit suicide more than once? I can't go into details but honest advice without sales talk will be appreciated
Drinking alcohol dumbs you down and people often abuse it to temporarily block whatever problems they have instead of facing them. It does not solve anything whatsoever and always makes matters worse. It is the cowardly coping mechanism in my opinion. Psychedelics, when used properly have the opposite effect as alcohol... they allow one to view situations from a different perspective, enhances consciousness and boosts creativity.
You can't go into detail, so we don't know what the underlying problems are exactly so I'm just going to speak in general and not give specific advice. For psychedelics to be most effective the person also has to be willing to face their problems and put in the effort to overcome them. Usually when someone decides to commit suicide it is due to some from of nihilism which can be from an infinite number of causes and identifying those causes is good place to start. You cannot overcome your problems if you don't know what they are and to people in a nihilistic state it is not always apparent what their problems are. The heightened state of consciousness and alterations in perception from psychedelics may help the person identify their problems. Using the boost in creativity from the psychedelics to create something that is meaningful is a very effective way to escape nihilism. Reducing consumption of destructive addictions such as social media, unconstructive entertainment (TV, YouTube, Netflix), porn, alcohol, some habit forming pharmaceuticals and drugs will help prevent the person from getting dragged back down into the nihilistic state as well.
There are a number of philosophic studies the person can pursue such as Stoicism to cope with the struggles of life and change their negativity into positivity. The difference between "happiness" and nihilism is only how one perceives reality and psychedelics can be very a helpful tool to change one's perception into a positive one.