Hi! We have several friends who are desperately trying to end some addictions (primarily tobacco, alcohol, and caffeine) and are having great difficulty breaking free. Are there any herbs that could be taken when the craving get intense to help them past that time and refocus their mind on regular life? I was thinking that some of sedating herbs may help them to relax and refocus. But any specific herbs or helps in general that people are aware of would be much appreciated!