In dealing with drug addiction you have to be self determined and the way to deal with drugs with drugs is medically and not spiritually. The human body is built to adapt and survive in any situation, although at first trial , you get a sign that you are abusing something harmful, you ignore and then the body with time adapt to this harmful substance. When you use drugs incessantly, your body no longer rejects it, but adapt to it.
Meeting God to resolve to resolve addiction is never a remedy, because it's an habit to caused upon yourself, you need more of medical attention and the grace of God.
Prayer at this point is necessary, but doesn't have the sole power to stop you from addiction, understanding the will of God will also help you stop addictions.
To stop drugs you have to help yourself, you have to be determined to stop addiction, it takes personal decisions to stop drugs .