Can't speak to crack/meth but junkies seem to be able to last a good long while. Dr. Carl Hart has interesting things to say on the whole subject. One of his i

Can't speak to crack/meth but junkies seem to be able to last a good long while. Dr. Carl Hart has interesting things to say on the whole subject. One of his ideas - most addicts just quit. There is much that is unknown on the subject.