I've used the Thomas method to quit using multiple illicit drugs in the past. It is a profoundly effective method in assisting to quit narcotic use but it is all in the mind and how he will handle it. The Thomas method is basically a nutritious/simplified detox way of flushing things out. Works overtime, don't expect A+ results in a day or two. I wish not to violate any rules here but if you don't have an rx for a benzo such as Valium there should be other things that can assist in times when the withdrawals are at their worst.