Alcoholism may be classified according to its symptomatic expression into three distinguished types: 
episodic excessive drinking habitual excessive drinking dependency of alcohol.
What does substance abuse mean?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What does substance abuse mean? [/INST] \n Alcoholism may be classified according to its symptomatic expression into three distinguished types: 
episodic excessive drinking habitual excessive drinking dependency of alcohol.</s>