...  addictive drug is one that causes uncontrollable and compulsive drug craving, seeking and the use of the drug, even if one is aware of negative effects and social implications. A person starts getting physically dependent on such drugs or alcohol, requiring it to pursue even day-to-day activities. In absence of availability of the alcohol or drugs, a person feels lost and irritated. The lack starts affecting the normal behavior and such a person just cannot function till he/she is able to take ...