how long till we have a miracle drug that not only instantly eliminates addiction but also balances dopamine / serotonin enough that the patient wants to have a productive, healthy lifestyle?

3 years, a decade, more?

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i'm optimistic enough to think that if an effective solution was found, we have enough alternative investors in the country to overcome incumbent resistance and make it successful

A more important question might be 'What will vested interests like big pharma, junk food, and alcohol companies do to prevent that from even  happening?"  The technology is the easy part compared to that.

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I think it will probably take longer. over a decade..

seems impossible, even if it eventually is, trust that it's still gonna be abused

Honestly kratom is pretty much that.  It’s crazy out there right now.

Never, they would not make money from it, expect even more worse drugs and illnesses so they can make money!