Getting "out of your head" is great - but drugs and alcohol greatly increase the likelihood that once you return to your head it will be attached to a body lying on a bed in a jail cell. That's no fun - trust me.
I was an epic drinker and smoker and ended up having to work very hard to get rid of both. It wasn't just the habits themselves either - but all the drinkers and smokers that come along with drinking and smoking.
Props!