Not that I'm aware of, it seemed rather arbitrary. The people who had been going to that clinic for a while all had massive doses, almost to a ridiculous degree. My perception was that it was to keep them hopelessly addicted. I was only peripherally involved as it was my friend who was the patient. He was very fortunate to have family with influence in the Mormon church - his family had the church send some local missionaries to help him - and they genuinely did help him escape that terrible situation.