Addiction is when a person has to keep on taking the drug to feel normal.

M- Memory

R- Reason

J- Judgment

M- Mechanical skills 

I- Intellect 

C- concentration 

E- Emotions

These are the things that get effected by drug use and use of alcohol this graph represents a high.

The Person that has taken the drug can have this effect as you see on this graph they can either  have a high or it could be the exact opposite.