There is no one drug that is the source of substance abuse issues. The source of our addiction lies within our mind and heart, in our reactivity to what life brings us, the habits of our thoughts that get us caught up in a self-centered world where we drug ourselves because we don't get what we want and get what we do not want. For people who drug themselves, there is no statute of limitations on past wrongs and perceived wrongs; we refuse to let go and let be. These mental obsessions cause such pain we drug to temporarily ease the pain, until we are ready again to resurrect them and repeat the cycle. This is why constantly working with our thoughts and emotions helps. All you have to figure out about any drug you are using is to be honest about you are relating to the drug and its effects. This is my experience only.