remedies for quit smoking marijuana

What are some herbal remedies for my former junkie boyfriend?

He tried almost everything in his teens, cocaine, marijuana, methamphetamine, opium, morphine, mushrooms, heroin, large amount of alcohol, etc. All it does now is smoke regular cigarettes, but he has done since the age of 12. Not ready to try to get it to quit, however, but I really want to help clean your system, especially the lungs. (I also like to learn about cleaning up my own lungs, because I had some phlegm, etc. ever since I moved to take care of my father, who also smokes.) So far I just give him plenty of green tea and massages. I know nothing really about natural medicine, so I would greatly appreciate any advice anyone has. Thanks for reading and hope you can help!

I just read an article that former addicts much cigarette smoke and drink too much coffee! It probably helps with his lust for others! Watch the film "Coffee and Cigarettes" if you have an idea! He probably knew what they were getting into dating an ex-addict. Do not be naive or unrealistic on the possibilities of the appellant, or spend their entire lives (and their children too) with a guy with serious financial and emotional problems. Best luck.