Why is that once a person starts taking alcohol or drugs, it is difficult to get rid of this habit? Discuss it with your teacher.

Once a person starts taking alcohol or drugs, he becomes addict to these substances physically and mentally. Whenever he tries to get rid of this habit, he shows unpleasant withdrawal symptoms and these include vomiting, diarrhoea, shivering, twitching, perspiration, abdominal and muscular cramps.

So, it becomes difficult for a person to get rid of this habit.