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That's another element I can add, but didn't want to as it's not something I've experienced and know, but have friends in this area.

Regardless of the drug you use, many are used to alleviate whatever problem you have e.g. Stress, Anxiety, Disorders, and then it becomes part of you, and you no longer have the need to address the root cause of why you need the drug. Again, not a doctor, but I think the poster above put it best as a "crutch". It's ok for short term, but long term, you allow yourself to ignore the root cause, which has long term effects.